Many of the rail police and railway district bayos have an issue number much like this one.
Most are marked on the guard, but those rivets prevented that location from being used.
I agree with Ryan's opinion "too weird to be fake".
I saw this one and thought it has the cool factor! "132" appears to be the issue number (as I don't think it is a rework number). Marking doesn't look like anything Czech-applied I have seen before, either.