My wife inherited from her father what I think is a World War II-era Camillus knife. It looks very similar to the current 5-inch-blade Pilot Survival models offered by Camillus, but it has a six-inch blade. The other features are there: sawtooth back blade, stacked leather washer handle, hammerhead pommel, and the blade is marked Camillus N.Y. at the cross guard. Any information about this knife will be greatly appreciated. Thanks!