Blank backs, blank fronts, wrong fronts and back combos can be found pretty regularly under searches for "Topps variation" or "Topps error". They do not get recognition in master set checklists and so value as Neal mentioned usually involves whether the player is a star and desirable to collectors of that player as an oddity. My experience is blank backs with a star front seem more in demand than blank fronts. But I do not collect football cards.
Last edited by ALR-bishop; 10-01-2017 at 09:14 AM.
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