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Automatic watch. An automatic or self-winding watch is a mechanical watch in which the mainspring is wound automatically as a result of the natural motion of the wearer to provide energy to run the watch, making manual winding unnecessary. A mechanical watch which is neither self-winding nor electrically driven is called a manual watch. Most mechanical watches manufactured today are self-winding.
Diane Shear/Demand Media. Step 3. Check to make sure the watch is running. The 30 seconds or so of winding were enough to get it started, but you should keep your watch on throughout the day so the motion of your body continues to wind it up; when fully wound, the watch will keep regular time for dozens of hours.