1978 Airmail – The 200th Anniversary of the Birth of General Bernardo O’Higgins, National Hero of Chile 1978 Airmail – The 200th Anniversary of the Birth of General Bernardo O’Higgins, National Hero of Chile 1978 Airmail – Hubert Humphrey Commemoration 1978 Airmail – Christmas – Children’s Paintings 1978 Airmail – Ecuadorian Painters 1979 The 50th Anniversary of Inter-American Women’s Commission 1979 Airmail – The 150th Anniversary of Battle of Portete and Tarqui 1979 Airmail – The 150th Anniversary of Battle of Portete and Tarqui 1979 The 16th Anniversary of Ecuadorian Mortgage Bank 1979 Galapagos Islands 1979 Airmail – Galapagos Islands 1979 Airmail – Galapagos Islands 1979 Airmail – The 5th Anniversary of Ecuador-American Chamber of Commerce 1979 Airmail – The 5th Anniversary of Ecuador-American Chamber of Commerce 1979 Airmail – The 25th Anniversary of Extension to 200-mile Offshore Limit WM: 4 1979 Airmail – International Year of the Child WM: 4 1979 Airmail – Restoration of Democracy WM: 4 1979 Airmail – The 5th National Games 1979 Airmail – Inauguration of CIESPAL, Ecuadorian Institute of Engineers, Building WM: 4 1980 The 200th Anniversary of the Birth of Jose Joaquin de Olmedo, Physician 1980 Airmail – The 200th Anniversary of the Birth of Jose Joaquin de Olmedo, Physician 1980 Chiefs of the Indo-American Indian Tribes 1980 Airmail – Chiefs of the Indo-American Indian Tribes 1980 Airmail – Chiefs of the Indo-American Indian Tribes