J. Gill, you are probably correct. I didn’t pay that much attention to the lettering and mistook it for the same mark that’s on the Winchester M1895 Russian contract rifles from the same era. That is a different mark altogether though with the only similarity being the “3”. My mistake.
Now I’m wondering what the “Б” stands for. It is not the Cyrillic “B” which sounds like “V” and is the first letter in vintovka (rifle). Nor is it a Cyrillic P for patron (cartridge).