This Knuckle Knife features a 10 1⁄4” blade made from a US Model 1860 Cavalry Saber blade. Blade is marked at the ricasso: U. S., D. F. M, 1864 and on the reverse ricasso: EMERSON & SILVER, TRENTON, N. J. Handle is a cast aluminum copy of a US Mark I Trench knife made in France by Au Lion with the grooved back and is marked U. S. 1918. The skullcrusher nut has been enlarged and lenghtened. The original scabbard appears to have been fabricated from a bayonet scabbard with the mounts painted aluminum. Reference the Wright book Military Theater Knives of WWII p. 71, 2nd knife down.