GeCo had a huge mail-order business that between the wars would send a gun anywhere, including the Soviet Union. The quality was quite good for the money. Old German gunmakers believed in keeping the bore diameter undersized (and forcing cones short) - they believed this helped to prevent powder gas leaks around the wad, improving both patterns and velocity. Nearly 99% 12 gauge German guns from XX century were bored like that. Apparently, they also came from the factory with X-Full chokes in both barrels, in belief that the owner will go to the local gunsmith and have the chokes open to desired size.
