My guess would be it's a CVA kit gun. There should be writing on the barrel that says, "Black Powder Only," also either Connecticut Valley Arms, or Traditions, something like that, which will be a dead give away. Writing should be on top of the barrel, or on a flat near the breech opposite the lock. If you could find an old Dixie Gun Works catalog from the 70's, you would find the gun listed in that. It's still a neat find.