I just came across these in my collection. This was a 26-card Nolan Ryan commemorative set put out in 1992. The cards were produced by Donruss. The fronts are based on the regular Donruss set with the addition of the gold border. The Astros were wearing the uniform on this card during a game recently. I had tuned in late so I don't know why.Each card in the set chronicled a different year in Ryan's long career. The cards were inserted into various Coke products. You could mail away for the entire set for $8.95 plus some UPCs from the Coke packages.
I also have a poster showing all of the cards. I'm pretty sure they were giving the poster away with the Coke products. My kids were pretty young then and my wife and I weren't big soda drinkers so I didn't go after the set.
You can get the individual cards on eBay for a buck apiece plus shipping.