The Bidynator revolutionized automatic watchmaking. Developed by Felsa, it was the first automatic movement to wind in both directions. Unlike earlier systems that only charged the mainspring in one direction, the Bidynator converts every motion of the rotor — clockwise and counterclockwise — into stored energy. As the wrist moves, the rotor turns freely in both directions, transmitting power through a sophisticated gear system that continuously winds the mainspring. The result: higher efficienc
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Felsa Caliber 693 Watch Movement
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