CC19-
I'm not sure I'm seeing the same gun you're referring to, the images you linked us to show the top and side of a gun marked with the name you noted, but it has very little engraving, only simple border engraving and no area coverage.
It appears to be a pinfire shotgun re-worked into centerfire some time after it was originally built.
Show images of the undersides of the barrels and the surfaces of the action where the barrel flats and breeches mate up to - often called the 'action flats' or 'water table' and the 'standing breech' or 'standing breeches'
I want to see the makers and proof marks on the barrels, the locking system (how the barrels fit up to and secure to the gun for firing), the firing pin tips, and close-up images of the barrel breech and tops of the chamber area of the barrels.
--Tinker
...Almost every square inch on the receiver and hammers is engraved...