1980 Visit of King and Queen of Spain 1980 Airmail – Visit of King and Queen of Spain 1980 Airmail – Pichincha Provincial Council 1980 Equatorial Indians 1980 Airmail – Equatorial Indians 1980 Virgin of Mercy, Patron Saint of Ecuadorian Armed Forces 1980 Airmail – Virgin of Mercy, Patron Saint of Ecuadorian Armed Forces 1980 Virgin of Mercy, Patron Saint of Ecuadorian Armed Forces 1980 Virgin of Mercy, Patron Saint of Ecuadorian Armed Forces 1980 Virgin of Mercy, Patron Saint of Ecuadorian Armed Forces 1980 Airmail – The 100th Anniversary of U.P.U. Membership 1980 Airmail – The 100th Anniversary of U.P.U. Membership 1980 Airmail – The 75th Anniversary of Rotary International 1980 Olympic Games – Moscow, USSR WM: 5 1980 Airmail – Olympic Games – Moscow, USSR WM: 5 1980 Airmail – Olympic Games – Moscow, USSR 1980 Airmail – Olympic Games – Moscow, USSR 1980 Airmail – The 150th Anniversary of the Death of Marshal Antonio Jose de Sucre, 1795-1830 WM: 5 1980 The 150th Anniversary of Constitutional Assembly of Riobamba WM: 5 1980 Airmail – The 150th Anniversary of Constitutional Assembly of Riobamba WM: 5 1980 The 150th Anniversary of Constitutional Assembly of Riobamba 1980 Airmail – The 150th Anniversary of Constitutional Assembly of Riobamba 1980 The 50th Anniversary of Coronation of the Virgin of the Swans WM: 5 1980 The 1st Anniversary of Return to Democracy WM: 5

1976 Airmail – Archaeological Discoveries 1976 Archaeological Discoveries 1976 Flowers and Fruits Festival, Ambato 1976 Airmail – Flowers and Fruits Festival, Ambato 1976 Musical Celebrities 1976 Airmail – The 50th Anniversary of Lufthansa Airline 1976 Airmail – The 50th Anniversary of Lufthansa Airline 1976 Airmail – Post Office Building Project 1976 Airmail – The 50th Anniversary of Bolivarian Society 1976 Airmail – The 441st Anniversary of Guayaquil 1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito 1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito 1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito 1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito 1976 Airmail – The 200th Anniversary of American Revolution 1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, Bacteriologist, 1878-1928 1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, 1878-1928 1976 Airmail – Meeting of Agricultural Ministers of Andean Countries, Quito – Fluorescent Paper 1976 Airmail – Meeting of Agricultural Ministers of Andean Countries, Quito 1976 Airmail – Mariuxi Febres Cordero, South American Swimming Champion 1976 Airmail – President Luis Cordero Commemoration, 1833-1912 1977 Airmail – The 260th Anniversary of the Birth of Sister Catalina de Jesus Herrera, Religious Author, 1717-1795 1977 The 11th General Assembly of Technical Committees of the Pan-American Historical and Geographical Institute 1977 Airmail – The 11th General Assembly of Technical Committees of the Pan-American Historical and Geographical Institute 1977 Airmail – The 11th General Assembly of Technical Committees of the Pan-American Historical and Geographical Institute 1977 The 50th Anniversary of The Central Bank of Ecuador – Fluorescent Paper 1977 Airmail – The 50th Anniversary of The Central Bank of Ecuador – Gold Mask 1977 The 50th Anniversary of Guayaquil Rotary Club