It looks like a Cattaraugus 225Q knife that was issued in WWII. Some refer to it as a Commando or the QuartermasterKnife but it was more then likely issued to Supply types who used the knife to pry open wooden crates and then reseal them.
The grooves in the stacked leather handle is deliberate; and not some wierd wear pattern. They are a fairly common WWII knife; one in the condition like mine is worth around $125 or so...

The grooves in the stacked leather handle is deliberate; and not some wierd wear pattern. They are a fairly common WWII knife; one in the condition like mine is worth around $125 or so...