STAMP ISSUES RELATED TO ICAO (1978-1983)

Sao Tome and Principe : 30^th Anniversary of first airmail flight St. Thomas-Lisbon,

100th Anniversary of Sir Rowland Hill death and 35^th Anniversary of ICAO

Issue date: 28/12/1979
	Douglas DC‑3 Dakota from TAP (Transportes Aéreos Portugueses); ICAO emblem; route of first airmail flight followed from St. Thomas to Lisbon, Portugal (São Tomé, Accra in Ghana, Robertsfield in Liberia, Dakar in Senegal, Vila Cisne Iros in Western Sahara, Lisbon); Sir Rowland Hill’s picture.