Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard Breda M-37 which were obsoleted when the

which were obsoleted when the Luftwaffe moved to larger caliber guns in their bombers

The length of the hammer and its handle is 3⁄4 of the square diagonal

It remained in limited use with second line troops until the mid to late 1980s

Some units added the blood chit to the crew's flight suits while other units gave the blood chit out only for specific flights

Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard Breda M-37 which were obsoleted when 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.