This carbine was manufactured in 1877 and evidently saw many years of use in the American West. It has an integral blade front sight on the front barrel band, the two-line address and King's patent marking, a two leaf rear sight, a saddle ring on the left, the serial number on the lower tang, carbine stock and forearm, and brass buttplate with cleaning rod compartment door (rod absent). The forearm has a line of tacks along each side. The buttstock has three tacks on each side of the wrist, a cross on each side, a line of tacks along the top of the comb, and a double line of tacks bordering the butt. Brass tack decoration is commonly associated with Native Americans in the West and was also used by white westerners, and the '66 "Yellow Boy" is known to have been popular with Native Americans from many tribes in the West in the late 19th century. A very similar cross and double line border design can be seen the Winchester '66 in the Smithsonian that is attributed as surrendered by Hunkpapa Lakota holy man and leader Sitting Bull to Major David H. Brotherton in 1881.

Good with smooth gray and brown patina on most of the iron, attractive aged patina on the brass action and buttplate, mild oxidation and pitting, general mild scratches and marks, and a very attractive "frontier" appearance overall. The shrunken, well-worn stock and forearm are also fine and have moderate dings and scratches, some splitting at the forend tip, a few absent tacks, and darker and smoother wood in the areas protected by the tacks. Mechanically fine.