If the lions are not aluminum or brass (both were available in the field) then they're probably not theater knives. The lions would have been cast if they weren't taken off a donor knife. If they were cast in the field they'd need to be taken from available materials that would have come off of aircraft or ships.
They could have started life as Quartermaster knives. They're about the only issue knife with a similar fuller. The clip point QM below also is close. Get blade length numbers and compare them to the QM. You can't make a knife longer so as long as they're shorter or the same as the QM we might have narrowed the source blade type down.
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