South America

1958 The 100th Anniversary of the Argentine Confederation Stamps WM: 9

1958 International Geophysical Year WM: 9

1958 The 1st Anniversary of the Inauguration of the National Flag Monument WM: 9

1958 The 50th Anniversary of the Argentine Aero Club WM: 9

1958 The Transfer of the Presidential Mandate WM: 9

1958 Argentine-Bolivian Friendship, Inauguration of the Yacuiba-Santa Cruz Railway and Exchange of the Presidential Visits WM: 9

1958 Airmail – The 100th Anniversary of the Argentine Confederation Stamps and Philatelic Exhibition, Buenos Aires WM: 9

1958 The 100th Anniversary of the Argentine Confederation Stamps and Philatelic Exhibition, Buenos Aires WM: 9

1958 Airmail – Child Welfare WM: 9

1958 The 75th Anniversary of the Founding of La Plata WM: 9