Yup, the crank breaks off. White metal alloy was a dreadfully poor choice for that part. The actual “workings” of tge camera are within a white metal casement no bigger than a Rollei 35! The camera is large because of large film chambers for the QRS cassettes. These are formed brass boxes, rounded at the base with a snap on lid. Inside is a metal flat spring loop tge film coils into. The opening is lined with red felt. There is no advance for film other than the sprocket roller gears, and this system works well. As to that pesky missing crank, it means absolutely nothing in regard to the useabikity of the camera, you just turn the knob with the base part. I’ve had a Blast using it! Mine is the first version, serial A 5033. I’ve seen serial numbers to 15,000 range, so a Lot were made. The lens is a Graf Anastigmat, f 7.7 40mm fl, made by Graf Optical Company of South Bend Indiana (the home of Studebaker!) and is fixed focus, frame size is 24x32mm.
. Here’s an image from the QRS, a quick iPhone/invertshot of the Negative. The thing can take a good picture! Plus it’s a totally under the radar camera for candid shots because it doesn’t look like a camera