What is appears to be is the claw, while extending in and out, is not traveling up/down, so I believe it is not moving the film properly through. I verified that with the housing open and the manual film control knob, I can also see there is not a good loop at the bottom.
The film path and claw are clean. Pretty sure it's the claw movement at fault. Problem is, the case is closed with a special headed screw (see pic). I also don;t have a service manual for this so even if I can somehow figure out how to get this open, if's it's more then just dried grease i'm SOL....
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