I’ve got a gun with many similar features. It has a long .36 caliber long, heavy, barrel, no under rib, no cheek rest, and a walnut stock. The barrel on mine is signed by J. Rogers Elkhart Indiana. But the Elkhart Indiana has been over stamped with the signature stamp. Another oddity is the single barrel key secures the barrel to the stock by passing through a slot in the barrel. My gun is iron mounted, and the iron cap box is inletted in backwards.
Hungry Horse