So can we date this? Is it in fact pre-1912? I know very little about German proof/markings.

Concerning the rifle bore, it has not been slugged but the previous owner suggested that he thought it shot fine with 148gr 38 wadcutters. I have a number of different .358 bullets to try....and they are VERY cheap....over some 4759 or 5744 perhaps?

oskar, I did not get a scope with it.