Adding to the list, Camp Pie supposedly dates to before the Crimean War and was used as a ration item. It is found on the shelf of every supermarket in Oz next to bully beef. I like it fried as a breakfast meat, but it's a non-starter for the wife. Do they still sell it in the U.K.?
I can't say that I've ever heard of it but it may still be sold here under a different name. I take it that it's a tinned meat intended to go into a pie rather than a meat pie that's been canned? What type of meat is it, beaf, pork or something else?