Wall thickness Jim. "Very clean" likely means honed in a gun that has had that much use.
Drew:
I really doubt these barrels have ever been honed. Since no other work was apparently ever done; I can't imagine the owner ever touching the barrels. The gun show a lot of years of use but not any abuse. I suspect whoever shot it all these years very meticulously cleaned the barrels but that was about it.
However; I will have whoever fixes the top lever check the barrel wall thickness as well just to be on the safe side.
Jim
