Fascinating thread! The blank back M101 promo cards are very rare (a few exist?) but so are some of the rare back regular issue M101s. I guess the fact they are promo cards makes them unique, and perhaps more desirable. On the other hand, the fact that thousands of regular issue cards (with ad backs) were produced but in many cases only a few survived also makes them very desirable. So, generally speaking, I’m not sure the M101 promo cards have more appeal or are more desirable than the rare backs.
Thoughts?
Last edited by gregndodgers; 08-17-2025 at 12:10 PM.
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