The Rickey cards below are postcard sized, and cut from an issue of Tuff Stuff magazine, which I surprisingly don't actually have. The card on the left is a replica of the April 1991 issue's cover (minus the green box with his name at the bottom), which I'm assuming is the issue in which these cards were included, but I'm not positive. Does anyone have a copy of this issue that they could check?
Although you can't tell based on the scan, the replica cover card is card number 10, described as "original art by Dan Reilly." The card back that describes "a miniature replica of the April 1991 cover" is actually the reverse of the Reilly portrait card. Obviously the backs on these two cards are switched, which I can only assume to be true of all those that were printed.