Recognized as the first Bolt action metallic cartridge system arm adopted for issue by the U.S. Ordinance. Only 1001 made. Fine stock with clear inpsector's mark. Lock marked: 1865, U.S. E.G. LAMSON & Co WINDSOR VT. Receiver marked: Wm. PALMER, PATENT, DEC. 22 1863. Several clear inspector markings on Barrel, mounts etc. Bolt period been altered to also except centerfire cartidges.