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					Originally Posted by collectbaseball  I've always thought the Ty Cobb back was one of the rarest.... but I'm not too familiar with less mainstream type cards | 
	
 In raw numbers, it is one of the rarest backs.  There are only 14-15 known.  That would make it much tougher than Pirates in the sense that there are over 100 Pirates.  The difference is that for any given Pirate backed card, there are only 1-3 examples of the front image, whereas all the Cobb backs are red portrait Cobbs.  But if we are only looking at backs, the Ty Cobb brand definitely ranks.
JimB