Yeah, I can’t seem to find another example of the cross swords anywhere else online so not sure how crisp the Czech ones are supposed to be. I don’t think this one is an RC, no electro pencil, shellac, Russian black coating on the metal, and everything that’s is visible was renumbered to the receiver or already matches the receiver. I am fairly certain this one has Czech and possibly East German provenance.
I can’t for the life of me figure out what the alpha numeric code on the barrel is though.