It's a nice looking ca. 1850 rifle in good condition. If the gun were a Pennsylvania Rifle Works gun, I would expect the barrel to carry the same stamp. Without that stamp on the barrel, I doubt it was made by Pennsylvania Rifle works. But since the gun has a PA marked lock, and a nice, triangular butt profile, I'd suggest it probably came from central PA. Too bad there is no trace of the maker's initials or a name stamp on the barrel a few inches behind the rear sight, since the gun is nicely made and in good condition. If you find any trace of a name on top of the barrel, let us know, since we can then probably figure out who made it. Shelby Gallien