The barrel top is marked COLT’S PT.F.A.MFG.Co/HARTFORD CT. USA/No2. It is a 41 rimfire and has a good bore with traces of corrosion. The mechanical function is very good and tight. The barrel has 80% nickel and the frame still has traces of original nickel finish. The checkering on the grips is crisp and the marking are all very good. The serial number is 2639 and is matching numbers. Made 1870-1890.