OF - FAIR- some major parts replaced; minor replacement parts may be required; metal rusted, may be lightly pitted all over, vigorously cleaned; rounded edges of metal and wood; principal lettering, numerals and design on metal partly obliterated; wood scratched, bruised, cracked or repaired where broken; in fair working order or can be easily repaired and placed in working order.

Manufactured in 1880 as a fourth model with the serial number stamped in script on the lower tang and brass buttplate. Republic of Mexico marking on top of the barrel at the breech and right side of frame. Two barrel bands screws and magazine spring and cap are absent, rear sight is a replacement, coat of varnish applied to the wood and barrel obstructed. The receiver is also marked "137" on top, "000" on right side and "8.91" on underside. A number ("2/13?") is stamped on the right side of the stock wrist. "222" is stamped on the left side of the forearm. The Model 1866 was extremely popular on the western frontier in the post-Civil War era and typically saw extremely heavy use. Many Model 1866s were purchased by the Republic of Mexico, like this example.