Original U.S. WWI Cut-Down Model 1918 Mark I Trench Knife by L. F. & C. with Matching Cut-Down Steel Scabbard Holsters & Cases The sliding side door still

The sliding side door still opens

and the battery box worn on the operator's belt

The breech components normally have number stamps on them

There is some damage to the eagle-head but nothing serious

and they seem to be functional

Original U.S. WWI Cut-Down Model 1918 Mark I Trench Knife by L. F. & C. with Matching Cut-Down Steel Scabbard Holsters & Cases The sliding side door stillOriginal 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.