1950 Coat of Arms WM: 4 1951 The 60th Anniversary of Colombian Society of Engineer 1951 Airmail – Local Motives 1951 Airmail – Local Motives 1951 The 8th Anniversary of the Death of Guillermo Valencia, 1873-1943 1951 Nationalization of Barranca Oilfields – Previous Issue Overprinted “REVERSION CONCESION MARES 25 Agosto 1951” WM: 4 1952 Airmail – Local Motives 1952 International Airmail – Local Motives 1952 Colombian Doctors 1952 Building of Post Offices WM: 4 1952 The 100th Anniversary of Manizales 1952 The 1st Latin-American Congress of Iron Specialists – Previous Issue Surcharged 1952 Airmail – The 1st Latin-American Congress of Iron Specialists – Previous Issue Surcharged 1953 The 500th Anniversary of the Birth of Queen Isabela, the Catholic 1953 Airmail – Previous Issue Overprinted “AEREO” WM: 2 1953 Airmail – Previous Issues Overprinted “CORREO AEREO” and Surcharged WM: 4

1955 The 7th Postal Union Congress of the Americas and Spain 1955 Airmail – The 7th Postal Union Congress of the Americas and Spain 1955 The 100th Anniversary of the Death of Jose Eusebio Caro, 1817-1853 1955 Airmail – The 100th Anniversary of the Death of Jose Eusebio Caro, 1817-1853 1955 Airmail – Stamps for Domestic Airmail and 700th Anniversary of Salamanca University 1955 Airmail – Stamps for Domestic Airmail – Previous Issues Overprinted “EXTRA-RAPIDO”, “CORREO”, or Surcharged 1956 Local Motives 1956 Local Motives 1956 Local Motives 1956 Columbus Memorial Lighthouse 1956 Airmail – Columbus Memorial Lighthouse 1956 The 700th Anniversary of St. Elizabeth of Hungary 1956 Airmail – The 700th Anniversary of St. Elizabeth of Hungary 1956 The 400th Anniversary the Death St. Ignatius of Loyola, 1491-1556 1956 Airmail – The 400th Anniversary the Death St. Ignatius of Loyola, 1491-1556 1956 Pereira Commemoration 1956 Airmail – Pereira Commemoration 1957 Previous Issue Overprinted “EXTRA RAPIDO” 1957 Airmail – Not Issued Stamps Overprinted “EXTRA RAPIDO” 1957 The 25th Anniversary of Agricultural Credit Bank