A number of years ago, I inherited some things from a local World War I veteran. He had been in the Veterinary Corps. during the war. Among the things was a cloth sack that had about forty rounds of WW I issue 45 ACP. It actually looked very good considering it was probably 80 years old at the time. At the time, I had a nice Colt 1911A1 that had been brought back by a Navy pilot after WWII. I loaded up some of the old WWI issue ammo in a magazine and gave it a try. Surprisingly, all but one round went off. What was left of the ammo, I gave to a guy I knew who had a kid that was starting a cartridge collection. I wish I had saved a couple but he was thrilled to death to get them so it all worked out fine. If I remember correctly, the head stamps were marked "17" for 1917. Knowing the primers were corrosive, the 45 got a extra good cleaning.