There are two main categories: manual and quartz watches.
The mechanical (manual) watches have an internal mechanism that needs to be regularly wound up by hand, while the quartz watches are powered by a battery.
There is the possibility that with mechanical watches, you can overwind the mechanism and break the watch. The automatic watch, however, never overwinds the mechanism. On the other hand, a mechanical watch is found to be more accurate than an automatic watch.
One disadvantage of automatic and mechanical watches is the day and date function. The watch is automatically set to move over to the 1st of the month when a month has 31 days.
This watch required about 15 minutes of walking, in order to fully wind the watch up. In early 1778, Hubert Sarton designed an automatic wristwatch, which only needed the movement of the hand or arm to continually keep the watch fully wound up. The movement this early watch had is very similar to that of modern watches today.
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