ALL "rough forged tubes" passed through Banc D'Epreuves Des Armes a Feu De Liege (Proof House for Firearms of Liege) and were tested with the First Obligatory Proof Load for 12g breech plugged tubes intended for Double-Barreled Breech-Loading Sporting Guns with 21 grams = 324 grains = 11.8 Drams black powder and 32 grams = 1.12 oz. shot.

They were then (I suspect lightly) stamped with the script EL, and the mark rarely survived barrel grinding/finishing by the U.S. maker

This is a Lefever



The 'LLH' was the maker's mark. Hunter Arms frequently just overstamped the mark with the barrel steel. The 'C' is Crucible, but no record exist to know their role as middleman/importer?