Scott Catalog # : 4085 - 4088 / Artcraft First Day Covers.
Very Rare and Hard to Find Set!
Set includes: 4085 : 1940 Indian Four / 4086 : 1918 Cleveland / 4087 : Generic Chopper and 4088 : 1965...
Scott Catalog # : 3187a-o / Postal Commemorative Society First Day Covers.
Set includes: 3187a Polio Vaccine Developed / 3187b Teen Fashions / 3187c The "Shot Heard Round the World" / 3187d US...