Hi RVAH-7; welcome to ALR.
Post pictures of the gun, side views, butt plate, any inlays, close ups of the locks and the poured putur entry pipe and for sure any markings, especially proof marks. If the barrels are of twist steel do not attempt to fire the shotgun without a thorough exam by a competent gunsmith who works with twist steel barrels.
"CURRITUCK STEEL" refers to the steel from North Carolina in the mid 1800s, but that does not mean too much. It is those proof marks that might tell the tale. I suspect the barrels and locks will prove to have been made in europe.
dave