A watch, or a wrist watch, is an instrument worn on the wrist for timing/display time.
Watches are usually made of leather, rubber, nylon, stainless steel and other materials, into the strap, will show the time of the "table Head" bundle on the wrist.
The manufacture and production of watches are based on a simple and witty invention, this is the "spring", it can tighten and store energy, but also slowly release the energy, in order to promote the watch inside the operating device and the pointer, to achieve the display time function, the watch inside the spring device is called the main spring watch working principle
。 Watch construction watch consists of a table head, Strap (clasp). The parts of the table head include: movement, case, bottom cover, mirror, literal (often said dial), pointer, put (timing, also called), order (some of the table requirements).