My late Father-in-law gave me a bayonet that he liberated from the army in '45. All metal parts look to be chrome plated. The blade is 16 inches measured from the hilt. It has a wooden handle. Markings are US and 118670 (S/N?) on one side and RIA, the flaming bomb, and 1907 (model?)on the other. I have a Korean War and WWll 10" bayonet but I have not seen one like this. Can anyone help with any info?