In the 1960s the electronic quartz watch was invented, which was powered by a battery and kept time with a vibrating quartz crystal. 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. Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps, or any other kind of bracelet. It is designed to keep a consistent movement despite the motions caused by the person's activities. A modern wristwatch featuring solar charging and Bluetooth capabilitiesĪ watch is a portable timepiece intended to be carried or worn by a person.
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