Original, RARE, Model 1855 complete Lock & Hammer. Serial number 284 marked on all internal parts. There was a total of 1500 produced.
The carbines seems to have seen the most field use with Ohio volunteer cavalry regiments, with the 2nd, 3rd, 4th and 6th Ohio Volunteer Cavalry all receiving “monkey tail” carbines.
Condition of screws, tumbler, sear and springs are excellent. Mechanics are crisp and functional. This is a difficult lock to find and would be great for a restoration project or for a lock collection.