Here is a great vintage 1960's era pocketknife featuring Sandy Koufax found on eBay. It has two blades and a belt clip on the reverse. It doesn't seem very functional, but it sure looks cool. I believe these were originally sold at stadium concession stands at Dodger Stadium and through their mail order catalog. Over the years I've seen this show up from time to time, and they always sell at a reasonable value. This particular item just closed at a price of $37.98.