In "I wish I owned a time machine" hobby history is this advertisement from the December 1979 issue of The Trader Speaks for "sealed gum cases at the lowest prices ever seen!" And yup, that would be from Mike Cramer's Pacific Trading Cards. https://image.nostr.build/f4dfdcf944ce01d63f6361cb4a84aa750eb29f60158f34ff7cd011ce9d55e703.jpg