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					Originally Posted by jgannon  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.
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 I agree...AND the two Clay Dalrymple cards (I prefer the harder Philly card to the hatless portrait card). I have three complete sets, all have both cards. I haven't chased the white letters or any of the airbrush variations...but I do feel you need those two cards....