Tell me a little bit about the Jordan 1985 Nike "Jumpman" promo card
 

I know the card isn't particularly valuable and certainly isn't rare, but I was looking for some information. The Jordan "Jumpman" card was included with four other athletes, but how were they distributed? I have seen some references to shoe stores?

Also, I have seen a lot of mentions of reprints of the Jordan card. How can an original be differentiated from the reprints?

Thanks in advance for any information. :)