Original Item: Only One Available. The U.S. Model 1918 Mark I Trench Knife was the second major "Knuckle Knife" to be officially adopted and issued to the US military. It was developed for use in the horrific trench warfare that typified the stalemate on the Western Front during the latter part of World War One and saw use not only there, but during World War Two as well. The knife was manufactured in the United States by Henry Disston & Sons (H.D. & S.) as well as Landers, Frary & Clark (L.F. & C.) and Oneida Community Ltd (O.C.L.).

The knives were also produced in France and are marked with the usual 1918 and US marks, as well as Au Lion on the blade. Whether this mark was a maker's mark or simply a motto is not known. The U.S. M-1918 Mark I Trench Knife is easily identifiable due to its large "brass knuckle" style guard and grip. The knives were 11 ¾" in overall length, with a 6 ¾" dagger style blade. The brass grips were marked U.S. 1918 and with the makers name or initials.

As originally issued, U.S. made knives were entirely blackened; both the blades and the brass knuckle hilts. French-made knives had bright blades, and much less blackening on the hilt. These knives remained in use with the US military, classified as limited standard (secondary issue) through January of 1945, when the knives were officially classified as obsolete. The knives were carried in a blued sheet steel scabbard that was typically maker marked, and was equipped with a pair of wire tabs that were intended to engage the US pistol web belt, but never fit properly so various belts and rigs were used or the scabbards were replaced with more usable ones. Many of the knives issued during World War II ended up in substitute leather scabbards of various designs and styles, many of which were "theater made".

The example of the U.S. Model 1918 Mark I Trench Knife offered here is in very good condition. The knife is one of the French made examples which is marked on the ricasso with a (Reclining Lion) / AU LION. The blade mark is very crisp and well defined, much better than is usually encountered these days. This brass grip of the knife is clearly marked: U. S. 1918. As is usually the case with the AU LION marked knives, the cast brass grip is much rougher and cruder than the US made versions. As is also typical of the French made knives, the knuckle points are also less defined and not as sharp as the US made knives. The French made grips are cast with a variety of minor differences, and this one is cast with two grooves along the top edge of the grip. The brass knuckle grip has a lovely brass color with a bit of patina, and spots of oxidation. It looks like this example was sand cast, and the sand wasn't packed quite tightly enough, so there was a lot of texture, some of which was ground off.

The blades of most of the AU LION knives were produced in the white, with no finish on the blade. This example however has a blued blade, which we believe may have been done at arsenal post war, possibly for WWII use. There is also Z 5 2 & stamped into the tang of the blade. The blade is in good condition, and definitely saw use after the blade was blued. The edge has been sharpened several times, and now the blade is slightly shorter than when issued. There is a bit of staining and oxidation near the edge as well.

The custom leather scabbard is very similar to those used by the U.S. in WWII, which further supports the idea that this knife was reissued for use during the war. It is made from multiple pieces of leather, which are both stitched and rivetted together. It has an attached belt loop with a securing strap at the top. Condition is very good, with most of the stitching still intact, and a lovely aged brown leather color. There is a repair to the top of the belt loop, which had torn through at some point.

Overall this is a great example of the very popular and collectible World War I era US trench knife, most likely reissued with a new scabbard for WWII service. The knife and scabbard are 100% complete and original, and would make a fantastic addition to any military edged weapons collection. These brass D guard knuckle knives always make a great centerpiece to any military knife display and certainly draw attention due to their size and fierce appearance.

Specifications:
Blade Length: 6 5/8"
Blade Style: Double Edged Dagger
Overall length: 11 3/8“
Guard: 4" long x 3 3/4" wide
Scabbard Length: 7"