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Bluedial.com offers Hundreds of Automatic Watches. Among these watches are the Hamilton Scuba Automatic, Hamilton Jazzmaster Automatic, Hamilton X-Wind Automatic and many more. An automatic or self-winding watch is a mechanical watch (A mechanical watch is a watch that uses a non-electric mechanism to measure the passage of time. They are driven by a spring (called a mainspring). The mainspring is wound automatically by the natural motion of the wearer's arm, to make it unnecessary to manually wind the watch. An automatic watch contains a semicircular 'rotor', an eccentric weight that turns on a pivot, within the watch case. The normal movements of the user's arm and wrist cause the rotor to pivot back-and-forth on its staff, which is attached to a ratcheted winding mechanism. The motion of the wearer's arm is thereby translated into the circular motion of the rotor that, through a series of reverser and reducing gears, eventually winds the mainspring. Modern self-winding mechanisms have two ratchets and wind the mainspring during both clockwise and counterclockwise rotor motions. The fully-wound mainspring in a typical watch can store enough energy reserve for roughly two days, allowing automatics to keep running through the night while off the wrist. Usually automatic watches can also be wound manually by turning the crown, so the watch can be kept running when not worn, and in case the wearer's wrist motions are not sufficient to keep it wound automatically. Bluedial.com offers a 12 month limited warranty on all Hamilton watches.
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