Here is a U.S. 1917  Military Trench Knife Replica. 

This was the United States' first attempt at a trench warfare style fighting knife. There were equipped with a triangular "bayonet-style" blade.  The grips were wood and the knuckle-guards were either of the stamped steel "flanged" or "knobbed" styles.

Our 1917 Knife is a great looking replica.  It has an 8" double edge dagger blade and is 13 1/4 overall.  It has a wood handle with black coated steel knuckle guard. Comes with a brown leather belt sheath.