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Never Rarely Sometimes Always

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Never Rarely Sometimes Always

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101Minute creators - Eliza Hittman Resume - Never Rarely Sometimes Always is a movie starring Ryan Eggold, Théodore Pellerin, and Talia Ryder. A pair of teenage girls in rural Pennsylvania travel to New York City to seek out medical help after an unintended pregnancy directed by - Eliza Hittman cast - Sidney Flanigan. Never Rarely Sometimes Always Watch full article on maxi. Wasn't expecting this to come on before my daily memes but ok. Never Rarely Sometimes Always Watch full article.

Never rarely sometimes always watch full video. My kids are my sanity. It would be the end of me if I were to lose them. Wow, first Gone girl, and then this. the studio is taking this very seriously! I can't wait to watch this. Ladies and Gentlemen, r/niceguy the movie. Am I trippin, or is he saying Horn Claw. Watches trailer... 14 year olds: I can so totally relate,im such and agoraphobic and have anxiety disorder as well. *facepalms... Never Rarely Sometimes Always Watch full article on foot. Never rarely sometimes always watch full online. Albert cant lie guess so fuckboi. Never rarely sometimes always watch full time. 2019 good bye. Great job with this series so far i look foward to the next one everytime with excitement 😁.

Poor innocent souls.

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Never rarely sometimes always watch full movies. Never rarely sometimes always watch full movie. Love the music and sound effects. Bruh as a chinese guy in Italy, thats a big xD. Never rarely sometimes always watch full episodes. It's sad but in the end it's about killing babies. I love how people keep explaining that it was safe back then for children to be out alone. how ironic.

Never Rarely Sometimes Always Watch full review. I'm so addictive this to the story please send more. Oh sh&t I cant contain my excitement for the next part. I was a child during this time. Children were indeed, free, it was not untypical for children of the Beaumont's ages to go on an outing such as they did. Children would leave their homes early to play and would'nt be expected home other than lunch and were required to be home before the street lights came on. Neighbors would keep an eye on the local children (the beach was a tad over one mile from the Beaumont's home, which was a normal distance for kids to venture. I do not know stats, but there probably were just as many pedophiles then as there is now, per capita. My sisters and I were well educated on the warning signs, yet so many of our little class mates were victims, we even experienced a couple of narrow escapes. The internet has made us aware that child molestation is an epidemic, whereas back then, most thought it was an unfortunate thing that only happen within their family or small neighborhoods. It would be interesting and very helpful if somehow it could be determined by percentages the number of pedophiles exist within the world population. I'm guessing it would be significant and very alarming. p.s. it is cruel to put fault on the parent(s) there is No Greater Pain Than Losing One's Child, they lost three(3) and are, second to the children, victims, too.

All of the worlds' problems summed up in one second @ 1:14.

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Never Rarely Sometimes Always Watch full article on top. Things really go Intresting in this series can't wait to hear how it goes from here. Can't lie still had me on edge keep up the great narriations. If you take suggestions if you can don't one military related and just as Intresting i would love to hear it. Granted I haven't herd all of your stories just yet dosent mean i won't. Thank you for hard work. Never rarely sometimes always watch full free. This is gonna be my new favourite horror film.

 

Never rarely sometimes always watch full episode. Never rarely sometimes always watch full album. 14:56 has stopped working. Never rarely sometimes always watch full game. Never rarely sometimes always watch full length. The main attraction of this movie is 'Christopher Nolan. Definitely I'm in.

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Never rarely sometimes always watch full season. Finally a movie about the inadequate procedures in place that let young women suffer in College. Can't wait to see this. Never Rarely Sometimes Always Watch full. Finally, an original film. Something that hasn't been done before. 👏👏👏. Never rarely sometimes always watch full hd. Everybody: Make the videos longer Afro: makes video an hour long Everybody: damn Afro why the video so damn long. Is that from top to bottom or bottom to top? 🤔.

Never rarely sometimes always watch full body. Hollywood: Were out of original ideas Nolan: On your left. Teach your young girls that you can say No. I felt bad when that guy put his hand on her leg and kissed her. She didnt want it. Never rarely sometimes always watch full youtube.

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A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. The study of timekeeping is known as horology. Watches progressed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called mechanical watches. [1] [2] In the 1960s the electronic quartz watch was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from the mechanical watch. Historically, this is called the quartz revolution. [3] [4] Developments in the 2010s include smartwatches, which are elaborate computer-like electronic devices designed to be worn on a wrist. They generally incorporate timekeeping functions, but these are only a small subset of the smartwatch's facilities. In general, modern watches often display the day, date, month and year. For mechanical watches, various extra features called " complications ", such as moon-phase displays and the different types of tourbillon, are sometimes included. [5] Most electronic quartz watches, on the other hand, include time-related features such as timers, chronographs and alarm functions. Furthermore, some modern smartwatches even incorporate calculators, GPS [6] and Bluetooth technology or have heart-rate monitoring capabilities, and some of them use radio clock technology to regularly correct the time. Today, most watches in the market that are inexpensive and medium-priced, used mainly for timekeeping, have quartz movements. However, expensive collectible watches, valued more for their elaborate craftsmanship, aesthetic appeal and glamorous design than for simple timekeeping, often have traditional mechanical movements, even though they are less accurate and more expensive than electronic ones. [3] [4] [7] As of 2018, the most expensive watch ever sold at auction is the Patek Philippe Henry Graves Supercomplication, which is the world's most complicated mechanical watch until 1989, fetching 24 million US dollars (23, 237, 000 CHF) in Geneva on 11 November 2014. [8] [9] [10] [11] [12] As of December 2019, most expensive watch ever sold at auction (and wristwatch) ever sold at auction is the Patek Philippe Grandmaster Chime Ref. 6300A-010, fetching US$31. 19 million (31, 000, 000 CHF) in Geneva on 9 November 2019. [3][4] The most expensive pocket watch ever sold at auction is the Patek Philippe Henry Graves Supercomplication, fetching US$23. 98 million (23, 237, 000 CHF) in Geneva on 11 November 2014. History [ edit] The earliest dated watch known, from 1530 Watches evolved from portable spring-driven clocks, which first appeared in 15th century Europe. Watches were not widely worn in pockets until the 17th century. One account says that the word "watch" came from the Old English word woecce which meant "watchman", because it was used by town watchmen to keep track of their shifts at work. [13] Another says that the term came from 17th century sailors, who used the new mechanisms to time the length of their shipboard watches (duty shifts). [14] A great leap forward in accuracy occurred in 1657 with the addition of the balance spring to the balance wheel, an invention disputed both at the time and ever since between Robert Hooke and Christiaan Huygens. This innovation increased watches' accuracy enormously, reducing error from perhaps several hours per day [16] to perhaps 10 minutes per day, [17] resulting in the addition of the minute hand to the face from around 1680 in Britain and 1700 in France. [18] The increased accuracy of the balance wheel focused attention on errors caused by other parts of the movement, igniting a two-century wave of watchmaking innovation. The first thing to be improved was the escapement. The verge escapement was replaced in quality watches by the cylinder escapement, invented by Thomas Tompion in 1695 and further developed by George Graham in the 1720s. Improvements in manufacturing such as the tooth-cutting machine devised by Robert Hooke allowed some increase in the volume of watch production, although finishing and assembling was still done by hand until well into the 19th century. A major cause of error in balance wheel timepieces, caused by changes in elasticity of the balance spring from temperature changes, was solved by the bimetallic temperature compensated balance wheel invented in 1765 by Pierre Le Roy and improved by Thomas Earnshaw. The lever escapement was the single most important technological breakthrough, and was invented by Thomas Mudge in 1759 and improved by Josiah Emery in 1785, although it only gradually came into use from about 1800 onwards, chiefly in Britain. The British had predominated in watch manufacture for much of the 17th and 18th centuries, but maintained a system of production that was geared towards high-quality products for the elite. [19] Although there was an attempt to modernise clock manufacture with mass production techniques and the application of duplicating tools and machinery by the British Watch Company in 1843, it was in the United States that this system took off. Aaron Lufkin Dennison started a factory in 1851 in Massachusetts that used interchangeable parts, and by 1861 it was running a successful enterprise incorporated as the Waltham Watch Company. [20] Wristwatch [ edit] Mappin & Webb 's wristwatch, advertised as having been in production since 1898. The concept of the wristwatch goes back to the production of the very earliest watches in the 16th century. Elizabeth I of England received a wristwatch from Robert Dudley in 1571, described as an armed watch. The oldest surviving wristwatch (then described as a bracelet watch) is one made in 1806 and given to Joséphine de Beauharnais. [21] From the beginning, wristwatches were almost exclusively worn by women, while men used pocket watches up until the early 20th century. [22] Wristwatches were first worn by military men towards the end of the 19th century, when the importance of synchronizing maneuvers during war, without potentially revealing the plan to the enemy through signaling, was increasingly recognized. The Garstin Company of London patented a "Watch Wristlet" design in 1893, but they were probably producing similar designs from the 1880s. Officers in the British Army began using wristwatches during colonial military campaigns in the 1880s, such as during the Anglo-Burma War of 1885. [22] During the First Boer War, the importance of coordinating troop movements and synchronizing attacks against the highly mobile Boer insurgents became paramount, and the use of wristwatches subsequently became widespread among the officer class. The company Mappin & Webb began production of their successful "campaign watch" for soldiers during the campaign at Sudan in 1898 and accelerated production for the Second Boer War a few years later. [22] In continental Europe, Girard-Perregaux and other Swiss watchmakers began supplying German naval officers with wristwatches in about 1880. [21] Early models were essentially standard pocket-watches fitted to a leather strap but, by the early 20th century, manufacturers began producing purpose-built wristwatches. The Swiss company Dimier Frères & Cie patented a wristwatch design with the now standard wire lugs in 1903. Hans Wilsdorf moved to London in 1905 and set up his own business, Wilsdorf & Davis, with his brother-in-law Alfred Davis, providing quality timepieces at affordable prices; the company later became Rolex. [23] Wilsdorf was an early convert to the wristwatch, and contracted the Swiss firm Aegler to produce a line of wristwatches. [24] The impact of the First World War dramatically shifted public perceptions on the propriety of the man's wristwatch and opened up a mass market in the postwar era. The creeping barrage artillery tactic, developed during the war, required precise synchronization between the artillery gunners and the infantry advancing behind the barrage. Service watches produced during the War were specially designed for the rigours of trench warfare, with luminous dials and unbreakable glass. The War Office began issuing wristwatches to combatants from 1917. [25] By the end of the war, almost all enlisted men wore a wristwatch and after they were demobilized, the fashion soon caught on: the British Horological Journal wrote in 1917 that "the wristlet watch was little used by the sterner sex before the war, but now is seen on the wrist of nearly every man in uniform and of many men in civilian attire. " By 1930, the ratio of a wrist to pocket watches was 50 to 1. The first successful self-winding system was invented by John Harwood in 1923. Quartz [ edit] The commercial introduction of the quartz watch in 1969 in the form of the Omega Beta 21 and the Seiko Astron was a revolutionary improvement in watch technology. In place of a balance wheel which oscillated at perhaps 5 or 6 beats per second, they used a quartz crystal resonator which vibrated at 8, 192 Hz, driven by a battery-powered oscillator circuit. Since the 1980s, more quartz watches than mechanical ones have been marketed. Hamilton Electric [ edit] Hamilton Electric were the pioneers of the first electric watch [26] unlike the Quartz and the Bulova Accutron this was the first movement to use a battery as a source to oscillate the balance wheel. Hamilton released two models of the Electric: the first released was the Hamilton 500 on 3 January 1957, which was produced into 1959. This model had problems with the contact wires misaligning and the watch returned to Hamilton for alignment. The Hamilton 505 was an improvement on the 500 and was more reliable: the contact wires were removed and a non-adjustable contact on the balance assembly delivered the power to the balance wheel. Movement [ edit] Different kinds of movements move the hands differently as shown in this 2-second exposure. The left watch has a 24-hour analog dial with a mechanical 1/6 s movement, the right one has a more common 12-hour dial and a "1 s" quartz movement A Russian mechanical watch movement A so-called mystery watch, it is the first transparent watch, [27] c. 1890. The movement is fitted with a cylinder escapement. A movement of a watch is the mechanism that measures the passage of time and displays the current time (and possibly other information including date, month and day). Movements may be entirely mechanical, entirely electronic (potentially with no moving parts), or they might be a blend of both. Most watches intended mainly for timekeeping today have electronic movements, with mechanical hands on the watch face indicating the time. Mechanical [ edit] Compared to electronic movements, mechanical watches are less accurate, often with errors of seconds per day, and they are sensitive to position, temperature [28] and magnetism. [29] They are also costly to produce, require regular maintenance and adjustments, and are more prone to failures. Nevertheless, the craftsmanship of mechanical watches still attracts interest from part of the watch-buying public, especially among the watch collectors. Skeleton watches are designed to leave the mechanism visible for aesthetic purposes. A mechanical movement uses an escapement mechanism to control and limit the unwinding and winding parts of a spring, converting what would otherwise be a simple unwinding into a controlled and periodic energy release. A mechanical movement also uses a balance wheel together with the balance spring (also known as a hairspring) to control the motion of the gear system of the watch in a manner analogous to the pendulum of a pendulum clock. The tourbillon, an optional part for mechanical movements, is a rotating frame for the escapement, which is used to cancel out or reduce the effects of gravitational bias to the timekeeping. Due to the complexity of designing a tourbillon, they are very expensive, and only found in prestigious watches. The pin-lever escapement (called the Roskopf movement after its inventor, Georges Frederic Roskopf), which is a cheaper version of the fully levered movement, was manufactured in huge quantities by many Swiss manufacturers as well as by Timex, until it was replaced by quartz movements. [30] [31] [32] Tuning-fork watches use a type of electromechanical movement. Introduced by Bulova in 1960, they use a tuning fork with a precise frequency (most often 360 hertz) to drive a mechanical watch. The task of converting electronically pulsed fork vibration into rotary movements is done via two tiny jeweled fingers, called pawls. Tuning-fork watches were rendered obsolete when electronic quartz watches were developed. Quartz watches were cheaper to produce besides being more accurate. Traditional mechanical watch movements use a spiral spring called a mainspring as a power source. In manual watches the spring must be rewound periodically by the user by turning the watch crown. Antique pocketwatches were wound by inserting a separate key into a hole in the back of the watch and turning it. Most modern watches are designed to run 40  hours on a winding and thus must be wound daily, but some run for several days and a few have 192-hour mainsprings and are wound weekly. Automatic watches [ edit] Automatic watch: An eccentric weight, called a rotor, swings with the movement of the wearer's body and winds the spring Seiko 5 Automatic Watch 21 Jewels A self-winding or automatic watch is one that rewinds the mainspring of a mechanical movement by the natural motions of the wearer's body. The first self-winding mechanism was invented for pocket watches in 1770 by Abraham-Louis Perrelet, [33] but the first " self-winding ", or "automatic", wristwatch was the invention of a British watch repairer named John Harwood in 1923. This type of watch winds itself without requiring any special action by the wearer. It uses an eccentric weight, called a winding rotor, which rotates with the movement of the wearer's wrist. The back-and-forth motion of the winding rotor couples to a ratchet to wind the mainspring automatically. Self-winding watches usually can also be wound manually to keep them running when not worn or if the wearer's wrist motions are inadequate to keep the watch wound. In April 2014 the Swatch Group launched the sistem51 wristwatch. It has a purely mechanical movement consisting of only 51 parts, including a novel self-winding mechanism with a transparent oscillating weight. So far, it is the only mechanical movement manufactured entirely on a fully automated assembly line. [34] The low parts count and the automated assembly make it an inexpensive mechanical Swiss watch, which can be considered a successor to Roskopf movements, although of higher quality. [35] Electronic [ edit] First quartz wristwatch BETA 1 developed by CEH, Switzerland, 1967 Electronic movements, also known as quartz movements, have few or no moving parts, except a quartz crystal which is made to vibrate by the piezoelectric effect. A varying electric voltage is applied to the crystal, which responds by changing its shape so, in combination with some electronic components, it functions as an oscillator. It resonates at a specific highly stable frequency, which is used to accurately pace a timekeeping mechanism. Most quartz movements are primarily electronic but are geared to drive mechanical hands on the face of the watch to provide a traditional analog display of the time, a feature most consumers still prefer. In 1959 Seiko placed an order with Epson (a daughter company of Seiko and the 'brain' behind the quartz revolution) to start developing a quartz wristwatch. The project was codenamed 59A. By the 1964 Tokyo Summer Olympics, Seiko had a working prototype of a portable quartz watch which was used as the time measurements throughout the event. The first prototypes of an electronic quartz wristwatch (not just portable quartz watches as the Seiko timekeeping devices at the Tokyo Olympics in 1964) were made by the CEH research laboratory in Neuchâtel, Switzerland. From 1965 through 1967 pioneering development work was done on a miniaturized 8192  Hz quartz oscillator, a thermo-compensation module, and an in-house-made, dedicated integrated circuit (unlike the hybrid circuits used in the later Seiko Astron wristwatch). As a result, the BETA 1 prototype set new timekeeping performance records at the International Chronometric Competition held at the Observatory of Neuchâtel in 1967. [36] In 1970, 18 manufacturers exhibited production versions of the beta 21 wristwatch, including the Omega Electroquartz as well as Patek Philippe, Rolex Oysterquartz and Piaget. Quartz Movement of the Seiko Astron, 1969 (Deutsches Uhrenmuseum, Inv. 2010-006) The first quartz watch to enter production was the Seiko 35 SQ Astron, which hit the shelves on 25 December 1969, swiftly followed by the Swiss Beta 21, and then a year later the prototype of one of the world's most accurate wristwatches to date: the Omega Marine Chronometer. Since the technology having been developed by contributions from Japanese, American and Swiss, [37] nobody could patent the whole movement of the quartz wristwatch, thus allowing other manufacturers to participate in the rapid growth and development of the quartz watch market. This ended—in less than a decade—almost 100 years of dominance by the mechanical wristwatch legacy. Modern quartz movements are produced in very large quantities, and even the cheapest wristwatches typically have quartz movements. Whereas mechanical movements can typically be off by several seconds a day, an inexpensive quartz movement in a child's wristwatch may still be accurate to within half a second per day—ten times more accurate than a mechanical movement. [38] After a consolidation of the mechanical watch industry in Switzerland during the 1970s, mass production of quartz wristwatches took off under the leadership of the Swatch Group of companies, a Swiss conglomerate with vertical control of the production of Swiss watches and related products. For quartz wristwatches, subsidiaries of Swatch manufacture watch batteries (Renata), oscillators ( Oscilloquartz, now Micro Crystal AG) and integrated circuits (Ebauches Electronic SA, renamed EM Microelectronic-Marin). The launch of the new SWATCH brand in 1983 was marked by bold new styling, design, and marketing. Today, the Swatch Group maintains its position as the world's largest watch company. Seiko 's efforts to combine the quartz and mechanical movements bore fruit after 20 years of research, leading to the introduction of the Seiko Spring Drive, first in a limited domestic market production in 1999 and to the world in September 2005. The Spring Drive keeps time within quartz standards without the use of a battery, using a traditional mechanical gear train powered by a spring, without the need for a balance wheel either. In 2010, Miyota ( Citizen Watch) of Japan introduced a newly developed movement that uses a 3-pronged quartz crystal that was exclusively produced for Bulova to be used in the Precisionist or Accutron II line, a new type of quartz watch with ultra-high frequency (262. 144 kHz) which is claimed to be accurate to +/− 10 seconds a year and has a smooth sweeping second hand rather than one that jumps each second. [39] Radio time signal watches are a type of electronic quartz watch which synchronizes ( time transfers) its time with an external time source such as in atomic clocks, time signals from GPS navigation satellites, the German DCF77 signal in Europe, WWVB in the US, and others. Movements of this type may—among others—synchronize the time of day and the date, the leap-year status and the state of daylight saving time (on or off). However, other than the radio receiver, these watches are normal quartz watches in all other aspects. Electronic watches require electricity as a power source, and some mechanical movements and hybrid electronic-mechanical movements also require electricity. Usually, the electricity is provided by a replaceable battery. The first use of electrical power in watches was as a substitute for the mainspring, to remove the need for winding. The first electrically powered watch, the Hamilton Electric 500, was released in 1957 by the Hamilton Watch Company of Lancaster, Pennsylvania. Watch batteries (strictly speaking cells, as a battery is composed of multiple cells) are specially designed for their purpose. They are very small and provide tiny amounts of power continuously for very long periods (several years or more). In most cases, replacing the battery requires a trip to a watch-repair shop or watch dealer; this is especially true for watches that are water-resistant, as special tools and procedures are required for the watch to remain water-resistant after battery replacement. Silver-oxide and lithium batteries are popular today; mercury batteries, formerly quite common, are no longer used, for environmental reasons. Cheap batteries may be alkaline, of the same size as silver-oxide cells but providing shorter life. Rechargeable batteries are used in some solar-powered watches. Some electronic watches are powered by the movement of the wearer. For instance, Seiko's kinetic-powered quartz watches use the motion of the wearer's arm: turning a rotating weight which causes a tiny generator to supply power to charge a rechargeable battery that runs the watch. The concept is similar to that of self-winding spring movements, except that electrical power is generated instead of mechanical spring tension. Solar powered watches are powered by light. A photovoltaic cell on the face ( dial) of the watch converts light to electricity, which is used to charge a rechargeable battery or capacitor. The movement of the watch draws its power from the rechargeable battery or capacitor. As long as the watch is regularly exposed to fairly strong light (such as sunlight), it never needs a battery replacement. Some models need only a few minutes of sunlight to provide weeks of energy (as in the Citizen Eco-Drive). Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of solar cells needed to power them (Synchronar, Nepro, Sicura and some models by Cristalonic, Alba, Seiko, and Citizen). As the decades progressed and the efficiency of the solar cells increased while the power requirements of the movement and display decreased, solar watches began to be designed to look like other conventional watches. [40] A rarely used power source is the temperature difference between the wearer's arm and the surrounding environment (as applied in the Citizen Eco-Drive Thermo). Display [ edit] Analog [ edit] Casio AE12 LCA (liquid-crystal-analog) watch Traditionally, watches have displayed the time in analog form, with a numbered dial upon which are mounted at least a rotating hour hand and a longer, rotating minute hand. Many watches also incorporate a third hand that shows the current second of the current minute. Watches powered by quartz usually have a second hand that snaps every second to the next marker. Watches powered by a mechanical movement appears to have a gliding second hand, although it is actually not gliding; the hand merely moves in smaller steps, typically 1/5 of a second, corresponding to the beat (half period) of the balance wheel. In some escapements (for example the duplex escapement), the hand advances every two beats (full period) of the balance wheel, typically 1/2-second in those watches, or even every four beats (two periods, 1 second), in the double duplex escapement. A truly gliding second hand is achieved with the tri-synchro regulator of Spring Drive watches. All of the hands are normally mechanical, physically rotating on the dial, although a few watches have been produced with "hands" that are simulated by a liquid-crystal display. Analog display of the time is nearly universal in watches sold as jewelry or collectibles, and in these watches, the range of different styles of hands, numbers, and other aspects of the analog dial is very broad. In watches sold for timekeeping, analog display remains very popular, as many people find it easier to read than digital display; but in timekeeping watches the emphasis is on clarity and accurate reading of the time under all conditions (clearly marked digits, easily visible hands, large watch faces, etc. ). They are specifically designed for the left wrist with the stem (the knob used for changing the time) on the right side of the watch; this makes it easy to change the time without removing the watch from the wrist. This is the case if one is right-handed and the watch is worn on the left wrist (as is traditionally done). If one is left-handed and wears the watch on the right wrist, one has to remove the watch from the wrist to reset the time or to wind the watch. Analog watches, as well as clocks, are often marketed showing a display time of approximately 1:50 or 10:10. This creates a visually pleasing smile-like face on the upper half of the watch, in addition to enclosing the manufacturer's name. Digital displays often show a time of 12:08, where the increase in the number of active segments or pixels gives a positive feeling. [41] [42] Tactile [ edit] Tissot, a Swiss luxury watchmaker, makes the Silen-T wristwatch with a touch-sensitive face that vibrates to help the user to tell time eyes-free. The bezel of the watch features raised bumps at each hour mark; after briefly touching the face of the watch, the wearer runs a finger around the bezel clockwise. When the finger reaches the bump indicating the hour, the watch vibrates continuously, and when the finger reaches the bump indicating the minute, the watch vibrates intermittently. [43] Eone Timepieces, Washington D. C. -based company, launched its first tactile analog wristwatch, the "Bradley", on 11 July 2013 on the Kickstarter website. The device is primarily designed for sight-impaired users, who can use the watch's two ball bearings to determine the time, but it is also suitable for general use. The watch features raised marks at each hour and two moving, magnetically attached ball bearings. One ball bearing, on the edge of the watch, indicates the hour, while the other, on the face, indicates the minute. [44] [45] Digital [ edit] A digital display shows the time as a number, e. g., 12:08 instead of a shorthand pointing towards the number 12 and a long hand 8/60 of the way around the dial. The digits are usually shown as a seven-segment display. The first digital mechanical pocket watches appeared in the late 19th century. In the 1920s, the first digital mechanical wristwatches appeared. The first digital electronic watch, a Pulsar LED prototype in 1970, was developed jointly by Hamilton Watch Company and Electro-Data, founded by George H. Thiess. [46] John Bergey, the head of Hamilton's Pulsar division, said that he was inspired to make a digital timepiece by the then-futuristic digital clock that Hamilton themselves made for the 1968 science fiction film 2001: A Space Odyssey. On 4 April 1972, the Pulsar was finally ready, made in 18-carat gold and sold for $2, 100. It had a red light-emitting diode (LED) display. Digital LED watches were very expensive and out of reach to the common consumer until 1975, when Texas Instruments started to mass-produce LED watches inside a plastic case. These watches, which first retailed for only $20, [47] reduced to $10 in 1976, saw Pulsar lose $6 million and the Pulsar brand sold to Seiko. [48] A Casio CFX-400, scientific calculator watch. An early LED watch that was rather problematic was The Black Watch made and sold by British company Sinclair Radionics in 1975. This was only sold for a few years, as production problems and returned (faulty) product forced the company to cease production. Most watches with LED displays required that the user press a button to see the time displayed for a few seconds because LEDs used so much power that they could not be kept operating continuously. Usually, the LED display color would be red. Watches with LED displays were popular for a few years, but soon the LED displays were superseded by liquid crystal displays (LCDs), which used less battery power and were much more convenient in use, with the display always visible and no need to push a button before seeing the time. Only in darkness would a button need to be pressed to light the display with a tiny light bulb, later illuminating LEDs. [49] The first LCD watch with a six-digit LCD was the 1973 Seiko 06LC, although various forms of early LCD watches with a four-digit display were marketed as early as 1972 including the 1972 Gruen Teletime LCD Watch, and the Cox Electronic Systems Quarza. The Quarza, introduced in 1972 had the first Field Effect LCD readable in direct sunlight and produced by the International Liquid Crystal Corporation of Cleveland, Ohio. [50] In Switzerland, Ebauches Electronic SA presented a prototype eight-digit LCD wristwatch showing time and date at the MUBA Fair, Basle, in March 1973, using a Twisted nematic LCD manufactured by Brown, Boveri & Cie, Switzerland, which became the supplier of LCDs to Casio for the CASIOTRON watch in 1974. [51] A problem with Liquid Crystal Displays is that they use polarized light. If, for example, the user is wearing polarized sunglasses, the watch may be difficult to read because the plane of polarization of the display is roughly perpendicular to that of the glasses. [52] [53] If the light that illuminates the display is polarized, for example if it comes from a blue sky, the display may be difficult or impossible to read. [54] From the 1980s onward, digital watch technology vastly improved. In 1982 Seiko produced the Seiko TV Watch [55] that had a television screen built-in, [56] and Casio produced a digital watch with a thermometer as well as another that could translate 1, 500 Japanese words into English. In 1985, Casio produced the CFX-400 scientific calculator watch. In 1987 Casio produced a watch that could dial telephone numbers and Citizen revealed one that would react to voice. In 1995 Timex released a watch which allowed the wearer to download and store data from a computer to their wrist. Some watches, such as the Timex Datalink USB, feature dot matrix displays. Since their apex during the late 1980s to mid-1990s high technology fad, digital watches have mostly become simpler, less expensive timepieces with little variety between models. Cortébert digital mechanical pocket watch (1890s) Cortébert digital mechanical wristwatch (1920s) A silver Pulsar LED watch from 1976. A Timex digital watch with an always-on display of the time and date Illuminated [ edit] An illuminated watch face, using tritium Many watches have displays that are illuminated, so they can be used in darkness. Various methods have been used to achieve this. Mechanical watches often have luminous paint on their hands and hour marks. In the mid-20th century, radioactive material was often incorporated in the paint, so it would continue to glow without any exposure to light. Radium was often used but produced small amounts of radiation outside the watch that might have been hazardous. [57] Tritium was used as a replacement, since the radiation it produces has such low energy that it cannot penetrate a watch glass. However, tritium is expensive—it has to be made in a nuclear reactor —and it has a half-life of only about 12 years so the paint remains luminous for only a few years. Nowadays, tritium is used in specialized watches, e. g., for military purposes (See Tritium illumination). For other purposes, luminous paint is sometimes used on analog displays, but no radioactive material is contained in it. This means that the display glows soon after being exposed to light and quickly fades. Watches that incorporate batteries often have the electric illumination of their displays. However, lights consume far more power than electronic watch movements. To conserve the battery, the light is activated only when the user presses a button. Usually, the light remains lit for a few seconds after the button is released, which allows the user to move the hand out of the way. Digital LCD wristwatch Casio type F-E10 with electroluminescent backlighting. In some early digital watches, LED displays were used, which could be read as easily in darkness as in daylight. The user had to press a button to light up the LEDs, which meant that the watch could not be read without the button being pressed, even in full daylight. In some types of watches, small incandescent lamps or LEDs illuminate the display, which is not intrinsically luminous. These tend to produce very non-uniform illumination. Incandescent lamps are very wasteful of electricity. Other watches use electroluminescent material to produce uniform illumination of the background of the display, against which the hands or digits can be seen. Speech synthesis [ edit] Talking watches are available, intended for the blind or visually impaired. They speak the time out loud at the press of a button. This has the disadvantage of disturbing others nearby or at least alerting the non- deaf that the wearer is checking the time. Tactile watches are preferred to avoid this awkwardness, but talking watches are preferred for those who are not confident in their ability to read a tactile watch reliably. Handedness [ edit] Wristwatches with analog displays generally have a small knob, called the crown, that can be used to adjust the time and, in mechanical watches, wind the spring. Almost always, the crown is located on the right-hand side of the watch so it can be worn of the left wrist for a right-handed individual. This makes it inconvenient to use if the watch is being worn on the right wrist. Some manufacturers offer "left-hand drive", aka "destro", configured watches which move the crown to the left side [58] making wearing the watch easier for left-handed individuals. A rarer configuration is the bullhead watch. Bullhead watches are generally, but not exclusively, chronographs. The configuration moves the crown and chronograph pushers to the top of the watch. Bullheads are commonly wristwatch chronographs that are intended to be used as stopwatches off the wrist. Examples are the Citizen Bullhead Change Timer [59] and the Omega Seamaster Bullhead. [60] Digital watches generally have push-buttons that can be used to make adjustments. These are usually equally easy to use on either wrist. Functions [ edit] The Rolex Submariner, an officially certified chronometer Customarily, watches provide the time of day, giving at least the hour and minute, and often the second. Many also provide the current date, and some (called "complete calendar" or "triple date" watches) display the day of the week and the month as well. However, many watches also provide a great deal of information beyond the basics of time and date. Some watches include alarms. Other elaborate and more expensive watches, both pocket and wrist models, also incorporate striking mechanisms or repeater functions, so that the wearer could learn the time by the sound emanating from the watch. This announcement or striking feature is an essential characteristic of true clocks and distinguishes such watches from ordinary timepieces. This feature is available on most digital watches. A complicated watch has one or more functions beyond the basic function of displaying the time and the date; such a functionality is called a complication. Two popular complications are the chronograph complication, which is the ability of the watch movement to function as a stopwatch, and the moonphase complication, which is a display of the lunar phase. Other more expensive complications include Tourbillon, Perpetual calendar, Minute repeater, and Equation of time. A truly complicated watch has many of these complications at once (see Calibre 89 from Patek Philippe for instance). Some watches can both indicate the direction of Mecca [61] and have alarms that can be set for all daily prayer requirements. [62] Among watch enthusiasts, complicated watches are especially collectible. Some watches include a second 12-hour or 24-hour display for UTC or GMT. The similar-sounding terms chronograph and chronometer are often confused, although they mean altogether different things. A chronograph is a watch with an added duration timer, often a stopwatch complication (as explained above), while a chronometer watch is a timepiece that has met an industry standard test for performance under pre-defined conditions: a chronometer is a high quality mechanical or a thermo-compensated movement that has been tested and certified to operate within a certain standard of accuracy by the COSC (Contrôle Officiel Suisse des Chronomètres). The concepts are different but not mutually exclusive; so a watch can be a chronograph, a chronometer, both, or neither. Timex Datalink USB Dress edition from 2003 with a dot matrix display; the Invasion video game is on the screen Many computerized wristwatches have been developed, but none have had long-term sales success, because they have awkward user interfaces due to the tiny screens and buttons, and short battery life. As miniaturized electronics became cheaper, watches have been developed containing calculators, tonometers, barometers, altimeters, a compass using both hands to show the N/S direction, video games, digital cameras, keydrives, GPS receivers and cellular phones. A few astronomical watches show phase of the Moon and other celestial phenomena. In the early 1980s Seiko marketed a watch with a television in it. Such watches have also had the reputation as unsightly and thus mainly geek toys. Several companies have however attempted to develop a computer contained in a wristwatch (see also wearable computer). Electronic sports watches, combining timekeeping with GPS and/or activity tracking, address the general fitness market and have the potential for commercial success ( Garmin forerunner, Garmin Vivofit, Epson, [6] announced model of Swatch Touch series [63]). Braille watches have analog displays with raised bumps around the face to allow blind users to tell the time. Their digital equivalents use synthesised speech to speak the time on command. Fashion [ edit] Wristwatches and antique pocket watches are often appreciated as jewelry or as collectible works of art rather than just as timepieces. [64] This has created several different markets for wristwatches, ranging from very inexpensive but accurate watches (intended for no other purpose than telling the correct time) to extremely expensive watches that serve mainly as personal adornment or as examples of high achievement in miniaturization and precision mechanical engineering. Traditionally, dress watches appropriate for informal (business), semi-formal, and formal attire are gold, thin, simple, and plain, but increasingly rugged, complicated, or sports watches are considered by some to be acceptable for such attire. Some dress watches have a cabochon on the crown or faceted gemstones on the face, bezel, or bracelet. Some are made entirely of faceted sapphire ( corundum). Many fashions and department stores offer a variety of less-expensive, trendy, " costume " watches (usually for women), many of which are similar in quality to basic quartz timepieces but which feature bolder designs. In the 1980s, the Swiss Swatch company hired graphic designers to redesign a new annual collection of non-repairable watches. Trade in counterfeit watches, which mimic expensive brand-name watches, constitutes an estimated US$1 billion market per year. [65] Space [ edit] The zero-gravity environment and other extreme conditions encountered by astronauts in space require the use of specially tested watches. The first ever watch to be sent into space was a Russian " Pobeda " watch from the Petrodvorets Watch Factory. It was sent on a single orbit flight on the spaceship Korabl-Sputnik 4 on 9 March 1961. The watch had been attached without authorisation to the wrist of Chernuchka, a dog that successfully did exactly the same trip as Yuri Gagarin, with exactly the same rocket and equipment, just a month before Gagarin's flight. [66] On 12 April 1961, Yuri Gagarin wore a Shturmanskie (a transliteration of Штурманские which actually means "navigator's") wristwatch during his historic first flight into space. The Shturmanskie was manufactured at the First Moscow Factory. Since 1964, the watches of the First Moscow Factory have been marked by the trademark "Полёт", transliterated as "POLJOT", which means "flight" in Russian and is a tribute to the many space trips its watches have accomplished. In the late 1970s, Poljot launched a new chrono movement, the 3133. With a 23 jewel movement and manual winding (43 hours), it was a modified Russian version of the Swiss Valjoux 7734 of the early 1970s. Poljot 3133 were taken into space by astronauts from Russia, France, Germany and Ukraine. On the arm of Valeriy Polyakov, a Poljot 3133 chronograph movement-based watch set a space record for the longest space flight in history. [67] Through the 1960s, a large range of watches was tested for durability and precision under extreme temperature changes and vibrations. The Omega Speedmaster Professional was selected by NASA, the U. S space agency, and it is mostly known thanks to astronaut Buzz Aldrin who wore it during the moon landing, 1969. Heuer became the first Swiss watch in space thanks to a Heuer Stopwatch, worn by John Glenn in 1962 when he piloted the Friendship 7 on the first manned U. S. orbital mission. The Breitling Navitimer Cosmonaute was designed with a 24-hour analog dial to avoid confusion between AM and PM, which are meaningless in space. It was first worn in space by U. astronaut Scott Carpenter on 24 May 1962 in the Aurora 7 mercury capsule. [68] Since 1994 Fortis is the exclusive supplier for manned space missions authorized by the Russian Federal Space Agency. China National Space Administration (CNSA) astronauts wear the Fiyta [69] spacewatches. At BaselWorld, 2008, Seiko announced the creation of the first watch ever designed specifically for a space walk, Spring Drive Spacewalk. Timex Datalink is flight certified by NASA for space missions and is one of the watches qualified by NASA for space travel. The Casio G-Shock DW-5600C and 5600E, DW 6900, and DW 5900 are Flight-Qualified for NASA space travel. [70] [71] Various Timex Datalink models were used both by cosmonauts and astronauts. Scuba diving [ edit] Seiko 7002–7020 Diver's 200 m on a 4-ring NATO style strap Watches may be crafted to become water resistant. These watches are sometimes called diving watches when they are suitable for scuba diving or saturation diving. The International Organization for Standardization issued a standard for water resistant watches which also prohibits the term " waterproof " to be used with watches, which many countries have adopted. Water resistance is achieved by the gaskets which forms a watertight seal, used in conjunction with a sealant applied on the case to help keep water out. The material of the case must also be tested in order to pass as water resistant. [72] None of the tests defined by ISO 2281 for the Water Resistant mark are suitable to qualify a watch for scuba diving. Such watches are designed for everyday life and must be water resistant during exercises such as swimming. They can be worn in different temperature and pressure conditions but are under no circumstances designed for scuba diving. The standards for diving watches are regulated by the ISO 6425 international standard. The watches are tested in static or still water under 125% of the rated (water) pressure, thus a watch with a 200-metre rating will be water resistant if it is stationary and under 250 metres of static water. The testing of the water resistance is fundamentally different from non-dive watches, because every watch has to be fully tested. Besides water resistance standards to a minimum of 100-metre depth rating ISO 6425 also provides eight minimum requirements for mechanical diver's watches for scuba diving (quartz and digital watches have slightly differing readability requirements). For diver's watches for mixed-gas saturation diving two additional requirements have to be met. Watches are classified by their degree of water resistance, which roughly translates to the following (1 metre = 3. 281 feet): [73] Main Article ISO 6425 Water-resistance rating Suitability Remarks Water Resistant or 30 m Suitable for everyday use. Splash/rain resistant. NOT suitable for diving, swimming, snorkeling, water-related work, or fishing. Water Resistant 50 m Suitable for swimming, white-water rafting, non-snorkeling water related work, and fishing. NOT suitable for diving. Water Resistant 100 m Suitable for recreational surfing, swimming, snorkeling, sailing, and water sports. Water Resistant 200 m Suitable for professional marine activity and serious surface water sports. Suitable for diving. Diver's 100 m Minimum ISO standard for scuba diving at depths not requiring helium gas. Diver's 100 m and 150 m watches are generally old(er) watches. Diver's 200 m or 300 m Suitable for scuba diving at depths not requiring helium gas. Typical ratings for contemporary diver's watches. Diver's 300 +  m helium safe Suitable for saturation diving (helium-enriched environment). Watches designed for helium mixed-gas diving will have additional markings to point this out. Some watches use bar instead of meters, which may then be multiplied by 10, and then subtract 10 to be approximately equal to the rating based on metres. Therefore, a 5 bar watch is equivalent to a 40-metre watch. Some watches are rated in atmospheres (atm), which are roughly equivalent to bar. Navigation [ edit] There is a traditional method by which an analog watch can be used to locate north and south. The Sun appears to move in the sky over a 24-hour period while the hour hand of a 12-hour clock face takes twelve hours to complete one rotation. In the northern hemisphere, if the watch is rotated so that the hour hand points toward the Sun, the point halfway between the hour hand and 12 o'clock will indicate south. For this method to work in the southern hemisphere, the 12 is pointed toward the Sun and the point halfway between the hour hand and 12 o'clock will indicate north. During daylight saving time, the same method can be employed using 1 o'clock instead of 12. This method is accurate enough to be used only at fairly high latitudes. See also [ edit] References [ edit] ^ "CWorld | Christopher Ward | QUARTZ VS AUTOMATIC".. Retrieved 27 November 2018. ^ "What is a Watch Movement? Quartz vs Automatic vs Manual vs Kinetic | Est. 1897".. Archived from the original on 27 November 2018. Retrieved 27 November 2018. ^ a b "Four Revolutions: Part 1: A Concise History Of The Quartz Revolution - HODINKEE". HODINKEE. Retrieved 27 November 2018. ^ a b "A Concise History of the Quartz Watch Revolution".. Retrieved 27 November 2018. ^ Wikipedia: sections under Functions. ^ a b "Epson announces world's lightest GPS watch". The Verge. Retrieved 14 April 2012. ^ "Mechanical Watches Almost Disappeared Forever. Here's How They Didn't".. Retrieved 27 November 2018. ^ "Patek Philippe (THE HENRY GRAVES JR. SUPERCOMPLICATION)". Sotheby's. ^ Adams, Ariel. "$24, 000, 000 Patek Philippe Supercomplication Pocket Watch Beats Its Own Record at Auction". Forbes. Retrieved 23 November 2018. ^ "Swiss Pocket Watch Sells for Record $24 Million". Time. Retrieved 23 November 2018. ^ "Patek Philippe gold watch sells for record $24. 4M - CNN". CNN Style. 12 November 2014. Retrieved 23 November 2018. ^ "World's most expensive watch sold". BBC News. Retrieved 24 November 2018. ^ "Watch". The New Encyclopædia Britannica, 15th Edition. 4. Encyclopædia Britannica, Inc. 1983. pp. 746–747. ISBN   0-85229-400-X. Retrieved 3 June 2012. ^ Haven, Kendall F. (2006). 100 Greatest Science Inventions of All Time. Libraries Unlimited. p. 65. ISBN   1-59158-264-4. ^ Andrewes, William J. H. (1 February 2006). "A Chronicle of Timekeeping: Our conception of time depends on the way we measure it". Scientific American. Retrieved 1 May 2017. As William J. Andrewes (2006) notes: "In 1675 Huygens devised his next major improvement, the spiral balance spring. (... ) The spiral balance spring revolutionized the accuracy of watches, enabling them to keep time to within a minute a day. This advance sparked an almost immediate rise in the market for watches, which were now no longer typically worn on a chain around the neck but were carried in a pocket, a wholly new fashion in clothing. " ^ Milham 1945, p. 226 ^ "A Revolution in Timekeeping, part 3". A Walk Through Time. NIST (National Inst. of Standards and Technology). 2002. Archived from the original on 28 May 2007. Retrieved 28 May 2014. ^ Acta Eruditorum. Leipzig. 1737. p. 123. ^ Glasmeier, Amy (2000). Manufacturing Time: Global Competition in the Watch Industry, 1795–2000. Guilford Press. Retrieved 7 February 2013. ^ Roe, Joseph Wickham (1916), English and American Tool Builders, New Haven, Connecticut: Yale University Press, LCCN   16011753. Reprinted by McGraw-Hill, New York and London, 1926 ( LCCN   27-24075); and by Lindsay Publications, Inc., Bradley, Illinois, ( ISBN   978-0-917914-73-7). ^ a b Bruton, Eric (2000). The History of Clocks & Watches. Little, Brown and Company. p. 183. ISBN   0316853550. ^ a b c "The Evolution of the Wristwatch". Archived from the original on 8 December 2013. Retrieved 8 December 2013. ^ Rolex Jubilee Vade Mecum published by the Rolex Watch Company in 1946. ^ Brozek, John E. "The History and Evolution of the Wristwatch". International Watch Magazine. ^ Hoffman, Paul (2004). Wings of Madness: Alberto Santos-Dumont and the Invention of Flight. Hyperion Press. ISBN   0-7868-8571-8. ^ Worlds first battery powered watch ^ "Juan F. Déniz, The first transparent watch. Antiquarian Horology Journal" (PDF). Retrieved 7 April 2018. ^ "Temperature". Advice on Your Timepiece. Tag Heuer. ^ "Magnetism". Tag Heuer. ^ "The original pin-pallet". Archived from the original on 5 February 2012. Retrieved 27 May 2012. ^ "The Roskopf Watch". Archived from the original on 1 April 2012. Retrieved 27 May 2012. ^ "Buffat The Roskopf watch".. Retrieved 28 October 2017. ^ "Watchmaking in Europe and China: Watches & Wonders". Richemont. Worldtempus. Archived from the original on 11 October 2012. ^ "EXCLUSIVE: An inside view of the ETA high-tech Swatch Sistem51 production in Boncourt in the Swiss Jura – ".. 3 December 2014. Retrieved 28 October 2017. ^ "Swatch Sistem51 a Swiss-made watchmaking revolution".. Retrieved 28 October 2017. ^ "Milestones:Pioneering Work on the Quartz Electronic Wristwatch, 1962–1967".. Retrieved 27 May 2012. ^ "In the late 1960s teams of engineers working independently in Japan, Switzerland and the United States used newly created electronic components to completely reinvent the wristwatch" (PDF). IEEE. 2000. Archived from the original (PDF) on 13 October 2015. Retrieved 7 June 2016. ^ Quartz mechanisms usually have a resonant frequency of 32768  Hz, chosen for ease of use (being 2 15). Using a simple 15 stage divide-by-two circuit, this is turned into a 1 pulse per second signal responsible for the watch's timekeeping. ^ "Bulova introduces the most accurate watch in the world, the Precisionist". Crunch gear. 23 March 2010. Retrieved 8 July 2012. ^ "History of the Solar Wristwatch".. Archived from the original on 12 August 2007. Retrieved 17 January 2007. ^ "Why Time Stands Still for Watchmakers". New York Times. 28 November 2008. Retrieved 28 November 2008. ^ Barbara Mikkelson (13 May 2011). "The Ten Ten Tenet".. Barbara and David P. Mikkelson. Retrieved 14 July 2013. ^ "Tissot Silen-T User's Manual" (PDF).. Archived from the original (PDF) on 3 March 2016. Retrieved 28 October 2017. ^ Anita Li (14 July 2013). "Innovative Tactile Watch Helps You 'Feel What Time it Is ' ". Mashable. Retrieved 14 July 2013. ^ Callum Borchers (12 July 2013). "Thanks to Kickstarter, tactile watch debuts". The Boston Globe. Retrieved 14 July 2013. ^ "All in Good Time: HILCO EC director donates prototype of world's first working digital watch to Smithsonian". Texas Co-op Power. February 2012. Retrieved 21 July 2012. ^ " " TI $20 Watch", The Jerome and Dorothy Lemelson Center for the Study of Invention and Innovation, [Smithsonian Institution]".. Archived from the original on 18 August 2011. Retrieved 28 October 2017. ^ "Nerd Watch - Vintage Electronics Have Soul – The Pocket Calculator Show Website".. Archived from the original on 29 October 2017. Retrieved 28 October 2017. ^ U. Patent 4, 096, 550: W. Boller, M. Donati, J. Fingerle, P. Wild, Illuminating Arrangement for a Field-Effect Liquid-Crystal Display as well as Fabrication and Application of the Illuminating Arrangement, filed 15 October 1976. ^ "Casio TA-1000 Electronic Clock & Calculator". Magical Gadgets, Sightings & Brags. Pocket Calculator Show. Archived from the original on 15 April 2012. Retrieved 17 January 2007. ^ "First-Hand:Liquid Crystal Display Evolution – Swiss Contributions – GHN: IEEE Global History Network".. Retrieved 23 October 2011. ^ Ostdiek, Vern; Bord, Donald (2012). Inquiry into Physics. Cengage Learning. p. 343. ISBN   1-133-71150-2. Extract of page 343 ^ Breithaupt, Jim (2001). Physics (illustrated ed. Nelson Thornes. p. 151. ISBN   0-7487-6243-4. Extract of page 151 ^ Ge, Zhibing; Wu, Shin-Tson (2010). Transflective Liquid Crystal Displays. John Wiley & Sons. pp. 39–40. ISBN   0-470-68906-4. Extract of page 39-40 ^ "The Seiko TV Watch". Archived from the original on 6 October 2014. Retrieved 23 July 2014. ^ "T001 Instruction Manual" (PDF). Retrieved 27 May 2012. ^ "Alan's Vintage Watches". Radium Watch Dial Pattern. Retrieved 16 April 2015. ^ "A Guide to "Destro": Watches from Sinn, Mühle, Citizen, and More - Worn & Wound".. 10 May 2016. Retrieved 28 October 2017. ^ CITIZEN "BULLHEAD" CHALLENGE TIMER ^ "Hands-On: With The Omega Seamaster Bullhead (Live Pics + Pricing)".. Retrieved 28 October 2017. ^ "Muslim watches". Watchismo. Archived from the original on 28 September 2015. Retrieved 14 April 2012. ^ "Islamic Watch & Clock". ALFAJR. Retrieved 14 April 2012. ^ Hug, Daniel: Swatch lanciert 2015 eine intelligente Uhr. In: NZZ am Sonntag, 27 July 2014, page 26 (German) ^ Nazanin Lankarani (21 January 2013). "Buying Back a Forgotten Chinese Heritage". The New York Times. Retrieved 22 January 2013. We try to explain why it makes sense to spend $500, 000 on a watch. ^ "Havocscope Counterfeit Watches Market Value: $1 billion". ^ Burgess, Colin; Dubbs, Chris (2007). Animals in Space: From Research Rockets to the Space Shuttle (illustrated ed. Springer Science & Business Media. p. 213. ISBN   978-0-387-49678-8. Extract of page 213 ^ "Russian Space Watches History".. Retrieved 27 May 2012. ^ "Navitimer, the aviator favourite watch". Breitling. Retrieved 17 January 2007. ^ "". Fiyta. Archived from the original on 15 January 2007. Retrieved 17 January 2007. ^ "Internet Archive Wayback Machine". 14 November 2006. Archived from the original on 14 November 2006. Retrieved 23 October 2011. ^ "Internet Archive Wayback Machine". 4 March 2008. Archived from the original on 4 March 2008. Retrieved 23 October 2011. ^ "Watch Industry Questions and Answers: Water-Resistance". Europa Star. VNU eMedia Inc. Retrieved 17 January 2007. ^ "Watches".. Retrieved 28 October 2017. Further reading [ edit] Beckett, Edmund, A Rudimentary Treatise on Clocks, Watches and Bells, 1903, from Project Gutenberg Berner, G. A., Illustrated Professional Dictionary of Horology, Federation of the Swiss Watch Industry FH 1961–2012 Daniels, George, Watchmaking, London: Philip Wilson Publishers, 1981 (reprinted 15 June 2011) De Carle, Donald, (Illustrations by E. A. Ayres), Practical Watch Repairing, 3rd edition, New York: Skyhorse Pub., 2008. ISBN   978-1-60239-357-8. Significant information on watches, their history, and inner workings. Denn, Mark, "The Tourbillon and How It Works", IEEE Control Systems Magazine, June 2010, IEEE Control Systems Society, DOI 10. 1109/MCS. 2010. 936291. Grafton, Edward, Horology, a popular sketch of clock and watch making, London: Aylett and Jones, 1849 External links [ edit] Look up watch in Wiktionary, the free dictionary. Wikimedia Commons has media related to Watches. American and Swiss Watchmaking in 1876 by Jacques David The Watch Factories of America Past and Present by Henry G. Abbott (1888) Federation of the Swiss Watch Industry FH UK patent GB218487, Improvements relating to wrist watches, 1923 patent resulting from John Harwood's invention of a practical self-winding watch mechanism.

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