jay6ird....... Welcome to the forum. Very good question. I'm looking at my 1940 42 code that came as a complete rig and the size of the numbers on the bottom of both mags look more like the ones on the left hand side of the receiver or the bottom of the barrel rather than the ones on the front of the frame. The suffix stamp appears to be the same as found on the front. I checked my 1939 42 Code and it has one matching mag and it is the same as the 1940.