Well, it didn't look like any M-N I've seen before. Detachable box magazine (don't know the capacity, as this shop removes them from weapons that are on display), turn bolt (not straight pull), iron sights, receiver grooved for tip off mount. Long barrel (several inches longer than the CZ that was next to it in the rack). (Lighter than the CZ, but also several hundred dollars cheaper.) Finish looked OK (I really didn't have time to do more than a cursory examination).
I will try to go back tomorrow & examine closer...maybe even bring it home!
I wonder if the Warsaw Pact nations shared designs for trainers, like they did for other arms?
Should I look for more info on the MilSurp forum?
MM