Stamp Finder ↺ Scott or Y & T ? Centenary of the Telephone (in 1976) 1978 Regular and Airmail Stamps (June 19, 1978) Sc 710 / YT 757 Sc 711 / YT 758 Sc 712 / YT 759 Sc C466 / YT PA569 Sc C467 / YT PA570 Sc C468 / YT PA571