They could be, or might be blank backs. If you take 3 card sections, you eventually have either 1 or 4 cards left over per row. Topps hated waste and those panels are all 4 across, which makes sense. Now they could have just cut up some production sheets but the math works if they were from a small run intended as samples. No way to prove it now of course but it seems like a possible method to me. 5x5 sample/proof/final quadrants also makes sense as those are seen as well in the hobby, as shown in one of the posts above.
Last edited by toppcat; 09-06-2022 at 11:32 AM.
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