Colombia

1952 The 1st Latin-American Congress of Iron Specialists – Previous Issue Surcharged

1952 The 100th Anniversary of Manizales

1952 Building of Post Offices WM: 4

1952 Colombian Doctors

1952 International Airmail – Local Motives

1952 Airmail – Local Motives

1951 Nationalization of Barranca Oilfields – Previous Issue Overprinted “REVERSION CONCESION MARES 25 Agosto 1951” WM: 4

1951 The 8th Anniversary of the Death of Guillermo Valencia, 1873-1943

1951 Airmail – Local Motives

1951 Airmail – Local Motives