M91/30 Ukrainian sniper rifles

[vintage hunter]

I suppose you could count that as a special marking if you wish, but it wasn't stamped until sometime after the conversion process. Some say it wasn't added until the rifle went through a refurb as some Tulas have it too.
The Tula "CH", as I understand it, was stamped on the chamber during the accuracy test stage to denote the rifle showed above average accuracy. It amounts to the same thing as the "TR" on the butt socket of Enfield No.4 T's.
Neither is a 100% reliable way to determine a legit MN sniper as they are easily faked by anybody with a stamp set. My '43 Izhevsk PU is a good example. It's a 100% honest refurb mismatch that an overly zealous pervious owner tried to "correct" by stamping the matching scope number on the barrel above the lined out original and they even went so far as to EP the rifle and scope numbers on the mount. I swapped an obvious CIA fake for it even up. Education is still the most reliable method. Originals have certain traits that the fakers cant duplicate.