"I have seen it stated on several occasions that Krupp never "Made" any small arms barrels. They made large barrels for heavy ordnance & otherwise as far as rifles & shotguns go, they supplied the steel to barrel makers."

Raimey & 2-pipe...as to the 'makers' of shotgun barrels formed from Krupp steel...Raimey, I know you believe most of that work was done in Belgium in the early 20th century - do you find maker's marks on many barrels? Was this activity highly fragmented among many small trades shops, or were there a number of large companies?