.50-caliber lever-action repeating carbine, with 20.5" round barrel and 7-shot magazine. Receiver marked "E.G. Lamson & Co./Windsor, Vt./U.S./Ball's Patent/June 23, 1863/Mar. 15, 1864". Blued case-hardened, with walnut stock. Late production examples of this carbine have been noted with browned or bright barrels. In excess of 1,500 made between 1864 and 1867.