It is not a separate piece. Back to Top J jewels Part of a watch movement that act as bearings for moving parts. LCD watches have quartz movements. Vintage watch movements are powered by a mainspring and a balance wheel. They are not battery operated.
Movements are either mechanical or quartz.
They are as they were shipped from the factory. Back to Top S self winding A watch that is wound by the motion of the wearer's arm instead of by winding the stem. If an self winding watch is not worn for a few days, it will wind down. According to U.S. government regulation, a watch must be able to withstand to impact equal to being dropped to a wood floor from a height of 3 feet in order to be labeled shock resistant. Back to Top T tank watch Commonly used to refer to a rectangular mans watch.