Stamp Finder ↺ Scott or Y & T ? Education 1969 Regular and Airmail Stamps (August 12, 1969) Sc 618 / YT 645 Sc 619 / YT 646 Sc 620 / YT 647 Sc C342 / YT PA424 Sc C343 / YT PA425 Sc C344 / YT PA426