Proof is located on top of the barrel....put together gun that one would always have to make excuses for.
Dead giveaway on an early gun....at least I have never seen the proof on top on a legit pre war.
BSA, nice research on the later barrel thing.
I was going to toss in a bid on that std weight 375.Never seen one of those in the flesh,but I am not going to chase it for collecting.
