I am trying to ID my percusion rifle. It came from a warehouse in New york city. It has a 1810 date on the trigger plate. There's a brass or copper plate on top, aft of the hammer with old style nail fasteners. It has foreign language digits etched on the right side of the shoulder stock. The proof mark is partially visable, kind of looks like a gargoile with wings and a arrow head tail, ( hard to see). And the ram rod is missing.