cool neat to see someone who was collecting this stuff too at one point, i used to go and find them on purpose all the time and i have a few boxes full of them somewhere i used to get them out of a livestock sale barn up in the rafters above offices and such, and most all were rust free and perfect shape, i quit hunting for them years and years ago, probably 12 or 14 years ago, but still have them, but i been thinkign of tossing them, since i never get around to displaying them and dont have anywhere or way to do such a thing with them,
some of mine are so old they used triangle blade hand can opener to open them, before pull tab days,
i have no idea what years they quit doing that and when pull tabs started
really wish anyoen had any clue as to when that was,, but no one alive today seems to know anything, just is a long forgotten for forever thing i guess, unsolved mystery,
good luck with yours