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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

1960 Airmail – Stamps for Domestic Airmail WM: 5