It's probably what collectors call "matching after refurbishment" Sometimes the font's on renumbered parts can be similar and hard to recognize without experience. The rifle has several post war Sovietarsenal rebuild stamps visible in the picture and its been rebuilt at least once since it 's in M91/30 configuation so it's unlikely its got any original parts left on it. That said 300 is a excellent price for a Ex-Dragoon M91/30 and you should jump on it.