Burdick had help from many other collectors; I forget who helped him with the T Baseball cards but it was a prominent name as I recall. Don't forget that there could have been some access to information back them that we do not have today that helped divide up the ACC and the subgroupings.
Now I am following this and the related Red Cross thread with some interest as the debate is fascinating to me. A bigger question might be why are the type 1 Coupons and the Red Cross cards not assigned the same T number? Timing of the issues being later than T206 would have seemingly been a factor Burdick could have considered when classifying these two.
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