I have a WWII Japanese sword. It came directly from a WWII USMC Vet who served in the 4th Marine Division. It was supposedly used in a charge, and there is blood on the tip. Can anyone tell if that is really blood? I do not know much about this sword, and any information will be greatly appreciated. It measures about 34 inches long from the tip to the bottom of the tang. What kind is it, What year was it made, Who made it, etc. Thank You in advance for your help.