Watch is an instrument that people use to know the time; it could be worn on the hand (wristwatch) or carried in the pockets (pocket watch). The watch progressed from the 17th century until now with different shapes and brands, but the first appearance believed to happen in the 14th century.
In the current days, men and women wear watches as jewelry, not for the original benefit of the invention. In writing, the watch symbol is used to indicate a time of the day, to mark an hour for a particular event or catch attention to a special time of the day.