I think an answer to that question also would depend on what you consider to be a complete set. In my opinion for instance, if you have a particular 1952 Topps player, it doesn't matter if the card is a red back or black back.
But I wouldn't consider a 1969 Topps set complete unless you had both the Houston and Montreal versions of Don Clendenon.
Last edited by jgannon; 05-29-2020 at 07:24 PM.
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