When I get a little more time, I will search my 7.62 Tokarev file on this matter, to try to find the correspondence where my friend gave his version. I don’t want to do it from memory. It was years ago he sent it to me, and I hope I kept it. I was not keeping everything in my files in those days.
Right now, just to add to the record, I will list the variations I have. I do not collect dates, so the list will be incomplete:
Normal case design - 25m/m with normal length neck. Primer cup with black rubber insert:
X - * 5 51 (Brass Case)
aym 53 (steel case, small headstamp letters)
aym 53 (Steel case, large headstamp letters)
aym 53 (Steel case, large headstamp letters, shorter flutes in case sides)
Normal case length - 25 m/m, but with low shoulder: Primer cup with black
X - * 3 51 (Brass case)
aym 53 (steel case, large headstamp letters)
Short case and low shoulder. Primer cup is normal but snapped.
aym - 52 (Brass case)
aym - 53 (Brass case - larger headstamp letters than “aym - 52”)
aym 53 (Nickel-plated steel case and primer cup, bullet polished to be almost bright gold color)
aym 53 (Steel case)
Note that with the exception of the nickeled case round, all the steel cases are grey-green lacquered steel, as shown in the picture at the start of this thread.