After searching on the web it appears the regular gray card stock 1975 Topps Mail In Team Checklists are common and the thinner white stock is much more scarce, so apparently Topps switched over late in production. PSA lists the regular stock as GRAY BK on some of the flips. ETA: PSA has roughly the same amount for gray backs and white backs in their data base. https://www.psacard.com/pop/baseball...and-cut/120458
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“interesting to some absolute garbage to others.” —- “Error cards and variations are for morons, IMHO.”
Last edited by Cliff Bowman; 09-29-2023 at 05:52 PM.
Reason: Addition
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