12" heavy singled edged spear point blade, with a 2.5" false edge and 1.6" wide at the ricasso. Overall length 16.625" in overall length with a 4.6875" brass hilt with finger-grooved wooded grip insert. Obverse ricasso marked U.S.N. / D.R. / 1864 with the DR being the mark of US Navy inspector Daniel Reynolds and also with US Navy reinspection marks of an {ANCHOR} over GG, the mark of US Navy Commander and ordnance inspector Guert Gansevroot who was stationed at the Brooklyn Navy Yard from 1860-1862 and in 1865. Pommel cap also with Reynolds' script DR cartouche. Reverse ricasso marked with the AMES MFG Co / CHICOPEE / MASS maker's mark with the upper two lines arched and the "G" and "O" in the first line underlined. Grip secured by a screw in the mortise of the brass hilt. The knife bayonet is accompanied by its original leather scabbard with pinned brass mounts.