This is an excellent example of a experimental/prototype combination Trench Knife/Bayonet that was probably developed prior to WWII. It has the attributes of the standard WWI 1917/18 Trench Knife that was produced by the American Cutlery Company (A.C.Co.) that used a very similar stamped knuckle guard and has been fitted to a bowie type knife blade. A very similar example is also shown in the excellent book, "The American Knife" by Hardin on page 182. The blade is actually flat on one side and is ground lower edge with a bowie type clip point. The upper left side of the blade is lightly etched, "PAT/APPL/FOR/OL". The markings "O.L." could have represented the later abbreviated company/trade name for the Oneida Knife Company, who during WWII, produced the M1942 Bayonet for the M1 Garand. The blade is approximately 8 3/8 inch long, with an approximately 4 1/2 inch large wooden handle with finger grooves on the underside. The overall length is approximately 12 7/8 inches. The cross-guard/knuckle guard is actually manufactured from a flat steel stamping that has been shaped and bent that is just slid onto the tang of the blade and spot welded on the rear end of the handle. During forming the cross-guard was bent and double over at the upper part to provide additional support at the top for the barrel ring. The locking latch is actually on the underside of the handling, inside the knuckle guard, and the wooden handles are actually hollow that are really just simple wooden covers to enclose the internal mechanism. The rear of the handle is hand painted with the number "56". It does not come with any scabbard or sheath. It would appears to be a very formidable weapon designed and manufactured with extreme war expediencies in mind.

Fine. The steel shows a mixed brown patina, with some edge nicks on the edge. The blade markings are light but clearly visible. The grips show some light dents and wear. There are some traces of red paint present on top of the guard, which has an overall "prototype" rough stamped appearance. The grips are in fine condition with light red color overall with a small crack near the upper rear edge of the butt. The mounting hardware appears to be in good order.