Central rotor

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Automatic movement Zenith El Primero with central rotor

With this design principle of a self-winding movement, the weight segment turns at the center of the movement and is also mounted on the bottom side. So the entire housing size can be exploited - in contrast to the micro-rotor, where the movement is integrated and decentralized. Of great importance has become the principle of the ball-bearing of central rotors, which has been developed at Eterna. Another full-width rotor technology is the rare peripheral rotor.