Colombia

1975 The 100th Anniversary of Reconstruction of Cucuta City

1975 The 300th Anniversary of the City of Medellin

1975 The 150th Anniversary of Rafael Nunez, 1825-1894

1975 Airmail – International Women’s Year

1975 Airmail – The 450th Anniversary of City of Santa Marta

1975 The 450th Anniversary of City of Santa Marta

1975 The 100th Anniversary of the birth of Guglielmo Marconi, 1874-1937

1975 Airmail – Pre-Colombian Archaeological Discoveries – Sinu Culture

1975 Pre-Colombian Archaeological Discoveries – Sinu Culture

1975 Airmail – Colombian Art