Stamp Finder ↺ Scott or Y & T ? 500th Anniversary of the Discovery of America (in 1992) 1993 Regular and Airmail Stamps (July 30, 1993) Sc 854 / YT 853 Sc 855 / YT 854 Sc 856 / YT PA665 Sc 857 / YT PA666 Sc 858 / YT PA667 Souvenir Sheet (July 30, 1993) Sc 857a / YT BF51