1957 The 25th Anniversary of Agricultural Credit Bank

1960 U.N. Day WM: 5 1960 U.N. Day WM: 5 1960 Airmail – Simon Bolivar, 1783-1830 WM: 5 1961 The 8th Pan-American Highway Congress 1961 Airmail – The 8th Pan-American Highway Congress 1961 Domestic Express Airmail – The 8th Pan-American Highway Congress 1961 The 75th Anniversary of the Birth of Alfonso Lopez, 1886-1959 1961 Airmail – The 75th Anniversary of the Birth of Alfonso Lopez, 1886-1959 1961 Domestic Express Airmail – The 75th Anniversary of the Birth of Alfonso Lopez, 1886-1959 1961 Airmail – The 75th Anniversary of the Birth of Alfonso Lopez, 1886-1959 1961 The 50th Anniversary of Valle del Cauca 1961 Airmail – The 50th Anniversary of Valle del Cauca 1961 The 50th Anniversary of North Santander 1961 Airmail – The 50th Anniversary of North Santander 1961 Domestic Express Airmail – The 50th Anniversary of North Santander 1961 Airmail – Overprinted “AEREO” or Surcharged 1961 Department of the Atlantic Ocean 1961 Airamil – Department of the Atlantic Ocean 1961 Airmail – Department of the Atlantic Ocean 1961 Airmail – Department of the Atlantic Ocean 1961 Bolivar Sport Games, Barranquilla 1961 Airmail – Bolivar Sport Games, Barranquilla