Explorateur de timbres ↺ Scott or Y & T ? Martin Luther King 1970 Regular and Airmail Stamps (January 12, 1970) Sc 628 / YT 654 Sc 629 / YT 655 Sc 630 / YT 656 Sc C351 / YT PA433 Sc C352 / YT PA434 Sc C353 / YT PA435