.58 caliber. 40" round barrel secured by three rounded, solid spring-retained barrel bands. NSN. Bright finish, color casehardened lock and hammer, iron furniture, walnut stock. Single shot percussion muzzleloading rifle musket. Lock marked with a {Spread-Winged Eagle}/U.S. forward of the hammer and in two horizontal lines U.S./SPRINGFIELD under the bolster, dated 1864 at the tail. Breech of barrel dated 1864. Upper left breech with typical V/P/{Eagle Head}. Counterpane of stock with two crisp inspection cartouches, the first the script GK of Springfield Arsenal sub-inspector George Kimball and the second the script ESA of Springfield's Master Armorer Erskine S Allin. Barrel with correct 1864 pattern 2-leaf rear sight with aperture hole for the 300-yard distance. Retains the musket style front sight and bayonet lug, both slings swivels and an original straight shank, tulip head ramrod that is full-length with good threads. A very nice example of a the last of the muzzleloading Springfield muskets, the final official rifle musket of the Civil War period.