Thanks Renee, I own a large number of T206 baseball cards, cards featured in this HA product. The value of any particular card varies significantly by its specific back. There are around 38 possible back variations for the T206 set. A card’s value can jump from $50 to $50,000, for example, depending on its back. The manner in which HA encapsulated the cards in this set make it impossible to view each card’s back. Thus, my question remains, how do I tell? Did HA keep a master list? Is there a hidden code? Am I just out of luck?