1976 Archaeological Discoveries

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