View attachment 534154
This answers something I've wondered about. My wind up ZIM has an unusually deep case back that looks more suited to a self winding automatic.
I haven't opened it but the seller's images showed the movement and there's a high bridge across the center that must be part of the second hand drive train.
I suspect the ZIM movement was originally an older sub second type later redesigned and adapted to center second. IIRC The Russian Moscow Watch factories had bought the design for their movements from the French.
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