| General info : | | 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. | |
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| Source : | | https://en.wikipedia.org/wiki/Automatic_watch (en.wikipedia.org/wiki/Automatic_watch) | |
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