Sure it would be nice if all sleeved guns were marked, but they're not, so we have to be able to identify them with a magnifier or by some other means. If you insist that all sleeved guns be marked, how do you justify refinished guns that are indistinguishable from original, but not marked as such? I'm sure the rest of you are aware that Lowell's last statement about "what I said" is probably bogus. I have many guns with non original barrels that I don't regard as "toys". By the way, SKB, I own and shoot several British guns, don't belittle British Proof, only realize like you should that proof marks don't guarantee that the gun has not been bored or struck since those proof marks were applied. A wall thickness gauge trumps British Proof every time. Every one of the guns in UK auctions with the caveat "wall thickness below recommended minimums" bear proof marks. Proof marks are useful for policing makers of new guns. Once the guns have been out there for awhile, only a wall thickness gauge means squat.