I have a "Blood Chit", 10" x19 1/2" issued or given to me in Viet Nam[ I don't remember signing for it]. I think I got it in 1963-64 time frame but I'm not sure. Does anyone have a lead on where to find the registration numbers to determine age? It is the SE Asia-West Central Pacific version.I'm wondering if it was a WWII or the same as a WWII version that had been stored until Viet Nam got "warmed up".It has 14 langauges and ,of course, the red, and blue American Flag on a white background. All print is in blue. Any info will be greatly appreciated. Nick