My latest is a Hasselblad 500CM, factory marked as a 500C body that I picked up on fleabay for 35 clams. The upper back door didn't go all the way up. Easy remedy. I added an old back, lens, and folding finder from my junk box, and now I have a gorgeous 500CM for 35 bucks. Works perfect. Pretty neat, huh? BTW--A CM marked C is from 1971
Also from 1972. Had one that was manufactured in 1972, just prior to the model change. Found one of the rare diagonal split screens with the microprism collar and installed that.