In 1976, DC Comics released many packets of Super Hero Stamps. This packet contained 10 Superman stamps and also included foil stamps. The cover features the art and inking styles of Neal Adams and Dick Giordano. The stamps themselves feature the work of various artist including Curt Swan and Nick Cardy. This packet was the first in a series of packets that included Batman, Wonder Woman, “Shazam” (Captain Marvel), Super Villains, and many others.
Yes… I do have the stamps preserved in a stamp book.