Dating a watch

This innovation increased watches' accuracy enormously, reducing error from perhaps several hours per day.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 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.Today most watches that are inexpensive and medium-priced, used mainly for timekeeping, have quartz movements.

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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.

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.

Various extra features, called "complications", such as moon-phase displays and the different types of tourbillon, are sometimes included.

Modern watches often display the day, date, month and year, and electronic watches may have many other functions.Officers in the British Army began using wristwatches during colonial military campaigns in the 1880s, such as during the Anglo-Burma War of 1885.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.A watch is a timepiece intended to be carried or worn by a person.It is designed to keep working despite the motions caused by the person's activities.They generally incorporate timekeeping functions, but these are only a small subset of the smartwatch's facilities. Watches evolved from portable spring-driven clocks, which first appeared in 15th century Europe.

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