Argentina

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

1957 The 50th Anniversary of the Argentine Oil Industry WM: 9

1957 Airmail – International Correspondence Week WM: 9

1957 Reform Convention WM: 9

1957 Airmail – International Tourist Congress, Buenos Aires WM: 9

1957 Esteban Echeverria, Writer WM: 9

1957 The 100th Anniversary of the Argentine Railways WM: 9

1957 Airmail, Inter-American Economic Conference WM: 9