I've not been able to identify any marking on the top barrel flat. Lock is marked Joseph Golcher. Looks to be about 36-38 caliber. I'm in Ohio and to me it looks like one of many other rifles that were made in the Mid West in the last half of the 19th century. Other than the crack in the wrist the stock is very solid and the rifle points very naturally. I'm actually thinking of trying a restoration. I've no idea what the original triggerguard would have looked like though.