Colombia

1961 The 75th Anniversary of the Birth of Alfonso Lopez, 1886-1959

1961 Domestic Express Airmail – The 8th Pan-American Highway Congress

1961 Airmail – The 8th Pan-American Highway Congress

1961 The 8th Pan-American Highway Congress

1960 Airmail – Simon Bolivar, 1783-1830 WM: 5

1960 U.N. Day WM: 5

1960 U.N. Day WM: 5

1960 Airmail – Saint Isidor of Madrid Commemoration

1960 Airmail – Saint Isidor of Madrid Commemoration

1960 Saint Isidor of Madrid Commemoration