What is a Seiko Automatic watch?
A Seiko Automatic watch is not the same as a Seiko Kinetic watch. A Seiko Automatic is a mechanical wristwatch with a self-winding mechanism. In other words, one does not have to wind the crown periodically to keep the watch running. A manual or manual wind watch must be wound by hand, using the crown, usually every day, to operate continuously.
All self-winding watches work on the principle of converting arm motion (kinetic energy) into the winding of the mainspring (potential energy). Usually, this is performed by a half-disc of metal weighted at the edge called a rotor, which spins when the wearers arm is accelerated unpredictably (that is, when moved normally in the course of everyday life). This rotary motion is then geared down to wind the central arbor of the mainspring.
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$20.00 (4 Bids) Time Left: 16m |
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$49.99 $199.99
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