Hi, I have been able to partly disassemble my Ernemann 'Klapp' camera (built about 1920) since it is in need of a CLA. However I'm puzzled about the way the winding knob is attached to its rod - I don't see any screws or other types of fittings that hold this knob. Any ideas?
Btw the camera is the 9 x 12 cm version.

thanks
Ron