Watch | Definition of Watch by Merriam-Webster
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Watch A watch is a timepiece, typically worn either around the wrist or attached on a chain and carried in a pocket. Wristwatches are the most common type of watch used today.
Watches evolved in the 17th century from spring powered clocks, which appeared in the 15th century. The first watches were strictly mechanical.
As technology progressed, the mechanisms used to measure time have, in some cases, been replaced by use of quartz vibrations or electronic pulses. The first digital electronic watch was developed in Before wristwatches became popular in the s, most watches were pocket watches, which often had covers and were carried in a pocket and attached to a watch chain or watch fob.
In the early s, the wristwatch, originally called a Wristlet, was reserved for women and considered more of a passing fad than a serious timepiece.
Men, who carried pocket watches, were quoted as saying they would "sooner wear a skirt as wear a wristwatch". This changed in World War I, when soldiers on the battlefield found pocket watches to be impractical and attached their watches to their wrist by a cupped leather strap.
However, in andGirard Perregaux manufactured approximately wristwatches with the Calibre 32A movement, which became Observatory Chronometers certified by the Neuchatel Observatorywhile inand Seiko had wristwatches with its and Calibres certified.Sceptic meeting Tfue at Twitch Con... (VIDEO)
These observatory chronometers were then sold to the public for normal usage as wristwatches, and some examples may still be found today. The observatory competitions ended with the advent of the quartz watch movement, in the late s and early s, which generally has superior accuracy at far lesser costs. In the Observatory Chronometer Database OCD  went online, which contains all mechanical timepieces "chronometres-mecaniques" certified as observatory chronometers by the observatory in Neuchatel from todue to a successful participation in the competition which resulted in the issuance of a Bulletin de Marche.
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All database entries are submissions to the wristwatch category "chronometres-bracelet" at the observatory competition. The term chronometer is often wrongly applied to timekeeping instruments fitted with an additional mechanism that may be set in motion by pushbuttons to enable measurement of the duration of an event. Such an instrument is in fact a chronograph or chronoscope.
It may of course be chronometer-certified, provided it meets the criteria set for the standard.
Mechanical chronometers[ edit ] A mechanical chronometer is a spring-driven escapement timekeeper, like a watch, but its parts are more massively built. Changes in the elasticity of the Balance Spring caused by variations in temperature are compensated for by devices built into it.
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Hard stones such as diamond, rubyand sapphire were often used as jewel bearings to decrease friction and wear of the pivots and escapement. Chronometer makers also took advantage of the physical properties of rare metals such as gold, platinumand palladium.
Complications[ edit ] In horological terms, a complication in a mechanical watch is a special feature that causes the design of the watch movement to become more complicated.
Examples of complications include: