True, I had a Thomas Wild hammer gun where the nominal bore mark was missing so no way of telling if it was either in or out of proof. I sent it for re-proof. Also one re-proofed gun with Damascus barrels that came back with the mark 'sleeved' on one barrel; which it was clearly not. Just someone picking up the wrong punch. Also saw a gun marked as having 2 1/2" chambers but the 3 1/4 ton mark which was for 2 3/4" chamber guns. Yes, they do slip up from time to time. They have a high volume of guns go through and I suppose someone could easily pick up the wrong punch from time to time.
