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 or changing of a battery unnecessary. Perfect for people who travel frequently or who do not wear their watch every day. Check out our extensive range of automatic watches in a wide range of styles including gold, steel and rose gold finishes. In a mechanical watch the watch's gears are turned by a spiral spring called a mainspring. In a manual watch energy is stored in the mainspring by turning a knob, the crown on the side of the watch, winding the mainspring. Then the energy from the mainspring powers the watch movement until it runs down, requiring the spring to be wound again. Self-winding mechanisms continue working even after the mainspring is fully wound up.