This late production Henry rifle was manufactured by the New Haven Arms Company in 1866 and features the square-back, nickel-silver, front sight blade, a folding leaf rear sight with 900 yard center notch and elevator bar stop screw, the large diameter magazine follower, the beveled follower cut in the receiver, the second style receiver without the alternative rear sight dovetail, a rounded heel on the buttplate, and the larger, second style "HENRY'S PATENT. OCT. 16. 1860/MANUFACT'D BY THE NEWHAVEN ARMS. CO." address in two lines ahead of the rear sight in all serif letters. The rifle has a sling swivel on the left side of the stock and screw-mounted loop for a sling hook on the left side of the barrel. The sling swivel and loop were standard features on later production Henry rifles. The buttplate has a hinged brass door, and the stock has an empty compartment for a takedown cleaning rod. The serial number is stamped on the top barrel behind the rear sight. The Henry lever action rifle was the most advanced firearm manufactured during the Civil War, and late examples like this one remained in demand after the war and continued to be used alongside the new Winchester Repeating Arms Co. Model 1866. Both models were well-represented on the western frontier in the hands of both pioneers and various Native American nations, including the Lakota and Northern Cheyenne during the Great Sioux War of 1876.