Automatic watch
Timekeeping device that is driven by a spring that winds by motion of the wearer
Automatic watch
An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. It is distinguished from a manual watch in that a manual watch must have its mainspring wound by hand at regular intervals.
Read on Wikipedia · Image Petar Milošević, CC BY-SA 4.0
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