I feel like I keep showing this photo in various threads but this is the obscure set that most intrigues me. I know that we all call them Colgan’s Square Proofs, but exactly how they were issued and by whom (with certainty) is a mystery.
My theory is that they were issued to retailers each week to affix to a poster to advertise players that could be found by buying Colgan’s Chips gum. They are blank backed and the paper is an odd stock, similar I feel to that of a poster. I have Wagner, Addie Joss, Hal Chase and Home Run Baker. Between the top TPG’s, pop reports are fairly low for this issue.
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