Automatic Watch And a wonderful Watch

A self-winding or automatic watch is one that rewinds the mainspring of a mechanical movement by the nature motions of the wearer;s body. The first self-winding mechanism was invented for pocket watches in 1770 by Abraham-Louis Petrel  but the first :self winding:or automatic:.Wristwatch was the invention of a British watch repairer named john Hardwood in 1923.This type of watch winds itself without requiring any special action by the wearer.It uses an eccentric weight called a winding rotor which  rotates with the movement of the wearer wrist. The back-and-forth motion of the winding rotor couples to a ratchet to the wind the mainspring automatically.

Self-winding watches usually can also be wound manually to keep them running when not worn or if the wearer wrist motions are inadequate to keep the watch wound.

In April 2014 the Swatch Group launched the system 51 wristwatch. It has a purely mechanical movement consisting of only 51 parts, including a novel self-winding mechanism with a transparent oscillating weight. So far,it is the only mechanical movement manufactured entirely on a fully automated assembly line.



 The Low parts count and the automated assembly make it an inexpensive mechanical Swiss watch,which can be considered a successor to Rooftop movement , although of higher quality.