I had plastic sheets in the late 70's. In the early 80's I actually had 12 pocket sheets. Those didn't catch on, but the idea was that you could store them in scrapbooks and the sets would be thinner. I also had some Ace Cases. I think I bought them from Den's Collectors Den from the back of the Beckett guide. I was really excited to have them, but it wasn't long afterwards that I found them to be bulky and not exactly what I wanted.
I can't speak for everyone else, but I had no idea about the collectibility of cards in the mid 1970's, but I was placing my cards in Mason's Shoe Boxes in a very neat manner, so many years later, my 1974-78 cards were still pack fresh. I don't think it is unreasonable to think that a fair number of young lads from 1909-1941 might have done the same thing with their pre-war cards.
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Actively bouncing aimlessly from set to set trying to accomplish something, but getting nowhere
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