Model 1860 Navy Cutlass
Curved single edge steel blade with flat back & rudimentary false edge. Both faces with broad shallow fuller at back, below ricasso to false edge. Obverse ricasso with anchor stamp & "1862"; reverse with "Made by/AMES MFG. CO./CHICOPEE./MASS" on scroll. Brass half-basket hilt with deep sheet-brass guard on obverse, riverted to flange on counter & knuckle guards. Inner lip of reverse counterguard stamped "6M/101." Phrygian helmet pommel. Wooden grip wrapped in black leather having lost wire wrap.
Cf. a similar example in the Bonhams Dec 2011 auction catalogue, lot 6123.