1973 Airmail – The 25th Anniversary of U.N. Economic Committee for Latin America, C.E.P.A.L.

1977 Airmail – The 50th Anniversary of Guayaquil Rotary Club 1977 Airmail – The 50th Anniversary of Guayaquil Rotary Club 1977 Airmail – Meeting of the Presidents of Colombia and Ecuador – Fluorescent Paper 1977 Airmail – Meeting of the Presidents of Colombia and Ecuador – 1977 Airmail – Beatification of Brother Hermano Miguel 1977 Airmail – The 3rd Bolivarian Pneumological Seminar 1977 The 40th Anniversary of the Death of Jose Peralta, Writer 1977 Airmail – The 40th Anniversary of the Death of Jose Peralta, Writer 1977 Birds of the Galapagos Islands 1977 Airmail – World Telecommunications Day 1978 Airmail – The 10th Anniversary of the Death of Dr. Remigio Romero y Cordero, Poet 1978 Airmail – The 10th Anniversary of the Death of Dr. Remigio Romero y Cordero 1978 Airmail – The 50th Anniversary of the Social Security Institute – Fluorescent Paper 1978 Airmail – The 50th Anniversary of the Social Security Institute 1978 The 50th Anniversary of Military Geographical Institute 1978 Airmail – The 50th Anniversary of Military Geographical Institute 1978 Airmail – The 50th Anniversary of Military Geographical Institute 1978 Airmail – The 200th Anniversary of the Birth of General San Martin 1978 Airmail – The 200th Anniversary of the Birth of General San Martin 1978 Inauguration of Dr. Vicente Corral Moscoso Regional Hospital 1978 Airmail – Inauguration of Dr. Vicente Corral Moscoso Regional Hospital 1978 Airmail – Inauguration of Dr. Vicente Corral Moscoso Regional Hospital 1978 The 7th Meeting of Latin American Lions 1978 Airmail – The 7th Meeting of Latin American Lions 1978 Airmail – The 7th Meeting of Latin American Lions 1978 The 70th Anniversary of Filanbanco, Philanthropic Bank 1978 Airmail – The 70th Anniversary of Filanbanco, Philanthropic Bank 1978 Football World Cup – Argentina 1978 Football World Cup – Argentina 1978 Football World Cup – Argentina 1978 Football World Cup – Argentina 1978 Airmail – Vilcabamba, Valley of Longevity