South America

1923 Definitive Issues – General San Martin, with Period after Value WM: 9

1923 Definitive Issues, General San Martin WM: 6

1922 Definitive Issues

1921 -1922 The First Pan American Postal Congress, Inscription BUENOS AIRES + AGOSTO DE 1921

1921 -1922 The First Pan American Postal Congress, Inscription “REPUBLICA ARGENTINA”

1921 -1923 Definitive Issues, General San Martin WM: 9

1921 The First Pan American Postal Congress

1921 The 100th Anniversary of the Birth of Bartolome Mitre, 1821-1906

1920 The 50th Anniversary of the Death of General Urquiza, 1801-1870 WM: 7

1920 The 100th Anniversary of the Death of General Manuel Belgrano, 1770-1820 WM: 7