Template:POTD/2018-10-06

Picture of the day

An automatic watch, also called a self-winding watch, is a mechanical watch in which the natural motion of the wearer provides energy to run the watch, making manual winding unnecessary. The watch contains an oscillating weight that turns on a pivot, which is attached to a ratcheted winding mechanism. The earliest credible evidence for a successful automatic watch is that made by the Swiss watchmaker Abraham-Louis Perrelet in late 1776 or early 1777.Photograph: Petar Milošević