I have a knife which my uncle gave me when I was a kid. I have used it as my hunting knife for years, during this hunting season my buddy said that he thought that it was a WW2 Camillus USMC fighting knife. How-ever he said that the blade should be marked US CAMILLUS N.Y.,but my blade is marked U.S.M.C., CAMILLUS N.Y.( with no U.S.). With-out the US is it from WW2 or a post war piece?