Unlike winders which rotate the watch, the SPARTA winder gently “swings” the watch instead. Every 10 minutes the built-in microprocessor activates a servomotor causing the watch to swing back and forth for several oscillations just as it would if it were being worn on the wrist. The oscillating winding action is totally self-regulating. There is no chance for damaging an expensive watch by over winding it. Moreover, as the servomotor powers only the first oscillation in the 10-minute cycle with all succeeding oscillations totally powered by gravity, battery draw is minimal. Hence the winder is guaranteed to operate for at least two years without any need for a battery change; an ideal arrangement for unworn watches, which are kept in safes for long periods of time.

Burlwood

Orbita Sparta Double Prestige Watch Winder Will wind any watch. Runs on 2 "D" batteries that will run two years! Guaranteed to wind any watch, either metal bracelet or leather strap. Independent head operation. Glass front. The watch winder gently "swings" the watch.  Every 10 minutes throughout the day, the internal micro-processor activates the drive motor, causing the watch to swing back and forth for several oscillations just as it would if it were being worn on the wrist.

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