This is the second stage trench knife in the "knuckle-duster" types resulting from
the close-combat requirements of WWI. It replaced the US Model 1917 "Knuckle-Duster" Trench Knife.
It is a very effective and functional close-combat weapon. The hilt is entirely of cast-brass, with the exception of the pommel-cap which is a cap-nut
with a sharp conical tip. The "brass-knuckles" or "knuckle-duster" grip is rectangular in shape with four finger-holes; each hole/guard has a raised-point
on the outer surface of each finger-hole/guard; very effective. The upper counter-guard is normally slightly swept-forward (this example has the counter-guard bent backward almost 90 degrees).
Markings on the grip side-panel are U.S. 1918 over the manufacturer's name and 1918. The manufacturer's name will be either L.F.&C. (Landers, Frary, and Clark) - the most
common - or Au Lion (usually marked on the blade - French manufacture), or H.D.S., or O.C.L.. This example is L.F.C..
Overall length is ~11-1/2";
Straight ~6-1/8" double-edged blade is a very elongated four-edged diamond shape in cross-section (center "edges" are really a medial rib). Very sharp thrusting tip.
A second variant example of this knife is shown below. Many of these have appeared on the market recently and it is my suspicion - and my opinion - that most are probably artificially
aged modern reproductions; buyer beware.
If you need further information concerning markings or blades, please post your questions to me directly via E-mail.