Original U.S. WWI Navy Commander Named Model 1918 Mark I Trench Knife by L. F. & C. with Matching Steel Scabbard & Au Lion Hilt - Commander Hugo Isak Cairen Scottish Militaria retained by the side screw

retained by the side screw

as well as the size and maker mark over the left ear: Si

and coast guardsmen who have distinguished themselves by acts of valor

switched to skis

Original U.S. WWI Navy Commander Named Model 1918 Mark I Trench Knife by L. F. & C. with Matching Steel Scabbard & Au Lion Hilt - Commander Hugo Isak Cairen Scottish Militaria retained by the side screwOriginal Item. One of a Kind. 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.)