wow, did you use your detector to find them? How high were they? I don't have any of those, but I do have those two types of pull tabs. Yep, got em right here on the desk in front of me, along with thirty eight other pull tabs of various manufacture and date. Congrats on the nice finds.
Beer can collecting was a big hobby back in the 70's and some breweries would actually put out sealed empty cans for collecting purposes, not everyone that colected cans drank beer!!!!
bought my son a dallas cowboys roger stauback dr pepper bottle a log time ago. was full and sealed. i messed up set it so sunlight hit on it now its empty and still sealed.
As Quicksilver stated the breweries sold empty sealed cans for collectors. I still have about 600-700 cans stored in an attic from my collecting days. Lots os sealed empties.
That's emergency drinking water for disaster victims, My grandmother had bunch of those white Anheuser Busch drinking water from when the Mississippi river was over flowing its banks.