the back of the card is blank, there is a separate card with the instructions (I can post it if you want to see it) the story behind the cards is as follows: my late father in law was an avid collector with many valuable cards, he often sold cards to Alan Rosen. Anyway, my mother in law still lives in the same house with boxes of cards (these are mostly from the 80's and 90's) each card box is the long one with around 600 cards in each. My father in law was meticulous in the way he kept things. These cards weren't in that type of box, but in a small box with some large sized cards (5x7 inch) they were just sitting on top of them. When I squired them in 06, I couldn't find out much about them. There was only one or 2 things written. I contacted the author of the article who sent me to a second person who sent me to a third and so on. (I recognize the names of some of those people in this forum, I also sent the scans to the SBG in 07) Since then, I have learned as much as possible about them. (and I am still looking for more info, that is how i found this forum) I am sure that if my father in law (or Rosen) had any idea of the value of these cards, he would have bought them a long time ago. Now I have to decide what to do with them.