Received a 45 cal. Muzzleloader with a Josh Golcher rear action lock. Bought on an auction site for $275.00. 38” barrel, machined octagon to round, deep rifling, not sure of twist. Only damage is to the heel of the stock, small piece chipped off and brass butt plate bent a bit. From what I know Josh was a lock maker in the Philadelphia area in the early to mid 1800’s. Appear to be proof marks on breech end of barrel, any help identifying would be appreciated. Ran jag and patches with various cleaners down barrel, found expected rust, but got it fairly cleaned. Plan on its first visit to the range tomorrow. Unless you guys see something I don’t, I believe this is an original firearm from the 1800’s.