The U.S. Army has found that canned meats, vegetables and jam were in “excellent states of preservation” after 46 years.
I was serving with the Marines in Vietnam in 1966-67. Our C-rations at the time usually read 1944 or 1945. They generally tasted like crap either way. But they didn’t kill you either. Plus we got gum, four cigarettes, TP and matches!
Need to add the corn beef to the list.
I’ve heard that Spam lasts 30 years. I figure if the can is not swollen or corroded, it’s contents are probably safe to eat.