Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard French Helmets The right side of the

The right side of the barrel chamber also had a slot cut

possibly a later addition

Diameter: 2

and is only the fourth example that we have ever had

Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard French Helmets The right side of theOriginal 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.