I have bought lately a Fed-Zorki (one more!) mainly because of its back (and secondly because I had a 1948 1,5/5cm ZK to put on).
Here it is:
http://www.ussrphoto.com/UserContent2/16122019_IMG_2445.JPG
First surprise: my ZK lens does not have the right position on it (infinity at 3 o'clock rather than 12). The mount seems in correct position. So, rather than turning the lensplate, I have put an Industar Moskva "tomb" which was waiting for a body too...






