Probably the most logical choice is J.H. Johnston, Great Western Gun Works, Pittsburgh, PA. He was a large retailer, wholesaler, and importer to the gun trade and sold his own line of muzzleloaders offering Nos 11, 12, 13, and 14 common rifles, Nos 15 thru 19 Fine Sporting Rifles, and a No. 20 Horseback rifle with 4 options. He also offered double rifles, and single and double shotguns Nos 11 thru 149.