Colombia

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

1975 Airmail – Colombian Ecology

1974 Christmas

1974 The 100th Anniversary of Antioquia Railway

1974 Airmail – The 100th Anniversary of U.P.U. – Colombian Birds

1974 Airmail – The 100th Anniversary of Colombian Insurance Company