It looks like one of the Modelo Argentino 1879 rifles that hit the US market in the 1960's. My dad and my brother each bought one out of a barrel at an Oklahoma gunshop, $11.95 each. They were arsenal refurbished during the Peron regime and the barrels were broached to about .446. They are quite accurate, especially with black powder. The brass will last forever if you don't overload it with smokeless, or let it sit with BP residue after shooting.

Good luck!

jn


jn