Here's a 1968 German Summer Olympic set I've dug up. Includes several cards of US Gold Medalists I've pictured below, along with two other notables. Distance runner, Kip Keino and gymnast, Vera Caslavska.
For those not familiar with Caslavska, who dominated women's gymnastics during the 1960's, I'd suggest reading up on her. She was also an open protester during the '68 Olympic Games, and she ended up paying a steep price for it.
https://en.wikipedia.org/wiki/V%C4%9...A1slavsk%C3%A1