1982 Presidents of Colombia

1987 Airmail – Pure-bred Horses 1987 Airmail – The 100th Anniversary of “El Espectador” Newspaper 1987 The 150th Anniversary of the Birth of Jorge Isaacs, Writer, 1837-1895 1987 Definitive Issue 1987 The 33rd Anniversary of the Death of of Aurelio Martinez Mutis, 1884-1954 1987 Airmail – International Year of Shelter for the Homeless 1987 Social Security and Communications 1987 Airmail – The 1st Meeting of Eight Latin-American Presidents of Contadora and Lima Groups, Acapulco, Mexico 1987 Airmail – Christmas 1987 Nature Conservation 1987 Airmail – Nature Conservation 1988 Airmail – Rural Telephone Network 1988 Airmail – The 450th Anniversary of Bogota 1988 The 40th Anniversary of Declaration of Human Rights WM: 7 1988 Airmail – Pre-Columbian Art Treasures 1988 The 100th Anniversary of Bogota Water Supply and Sewerage Organization 1988 The 450th Anniversary of Pasto 1988 The 100th Anniversary of National Anthem by Rafael Nunez and Oreste Sindici 1988 The 100th Anniversary of the Birth of Maria Currea de Aya, Women’s Rights Pioneer, 1888-1985 1988 Human Rights WM: 7 1988 Airmail – Human Rights WM: 7 1988 Airmail – The 450th Anniversary of Bogota 1988 Airmail – Atlantic Sailfish WM: 7 1988 Nature Conservation WM: 7 1988 The 100th Anniversary of Return of Society of Jesus to St. Bartholomew’s Senior College 1988 Jorge Alvarez Lleras, Astronomer, 1885-1952 1988 The 100th Anniversary of the Birth of Eduardo Santos, 1888-1974 1988 Nature Conservation WM: 7 1988 Airmail – Zipa Tisquesusa, 16th-century Indian Chief 1988 Airmail – Pre-Columbian Art Treasures 1988 Airmail – Christmas 1988 Nature Conservation WM: 7 1988 Airmail – Nature Conservation WM: 7 1988 Andres Bello College 1989 Nature Conservation WM: 7 1989 Airmail – The 100th Anniversary of the Birth of Agustin Nieto Caballero, 1889-1975 1989 Airmail – The 100th Anniversary of the Birth of Laureano Gomez, 1889-1965 1989 Airmail – International Coffee Organization 1989 Airmail – The 12th Habitat U.N. Conference on Human Settlements, Cartagena 1989 The 25th Anniversary of Adpostal 1989 Airmail – Nature Conservation WM: 7 1989 Airmail – The 200th Anniversary of French Revolution