Automatic watch

An automatic watch, also known as self-winding watch or simply automatic, is a mechanical watch in which 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, likewise having no internal battery, must have its mainspring wound by hand at regular intervals.

Automatic watch

An automatic watch, also known as self-winding watch or simply automatic, is a mechanical watch in which 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, likewise having no internal battery, must have its mainspring wound by hand at regular intervals.