[drcy]

Duly note that many of the categorizations and all of the catalog letter-numbers were made by collectors after the fact (The tobacco companies didn't make the T206 name), and they could have been cataloged in different ways. The Allen & Ginter 'baseball card sets' are just collector made-up, because A & G issued the cards as issues that contained boxing, wrestling and other sports. I think the T206 as it is is proper, but it is not 'wrong' to suggest that they should have been sets cataloged by back brands, especially when compared to how other 'back brand' sets have been cataloged. The original question was a very good one, and, most interesting to me, I don't think I ever pondered that before.