.54 caliber. 22" barrel secured by a single rounded, solid spring-retained barrel band. SN: 15964. Bright finish, blued rear sight, brass and iron furniture, walnut stock. Single shot percussion breechloading carbine. Lock marked with a {Spread-Winged Eagle} and in three lines at the front J.H. MERRILL BALTO/PATENT JUL 7 1858/APL 9, MAY 21-28-61 and dated 1864 horizontally at the tail. Top of breech lever marked J.H. MERRILL BALTO/PAT JULY 1858. Counterpane with crisp script RKH inspection above the sling bar, the cartouche of civilian arms inspector Robert K Whitely. Small L sub-inspection marks are found on many parts. Correct multi-leaf rear sight remains in place, with the base doubling as the latch for the breech lever. Pinched blade front sight in place as well, along with the iron sling bar and ring.