Stamp Finder ↺ Scott or Y & T ? Paintings 1971 Regular and Airmail Stamps (April 29, 1971) perforated Sc 643 / YT 692 Sc 644 / YT 693 Sc 645 / YT 694 Sc 646 / YT 695 Sc C366 / YT PA472 Sc C367 / YT PA473 Sc C368 / YT PA474 imperforated and in different colors Sc 643 imperforated / YT 692 non dentelé Sc 644 imperforated / YT 693 non dentelé Sc 645 imperforated / YT 694 non dentelé Sc 646 imperforated / YT 695 non dentelé Sc C366 imperforated / YT PA472 non dentelé Sc C367 imperforated / YT PA473 non dentelé Sc C368 imperforated / YT PA474 non dentelé Souvenir Sheets (April 29, 1971) Sc 647 / YT BF34 Sc 648 / YT BF35