1927 (1 Aug) Austria, First Flight Airmail Cover, Vienna - Rome, with Italian Agitational postmark on back, franked by Sc. C12 (Image)

1935 Belgian Congo, First Flight Airmail Registered Cover, Inauguration of the regular air service, Brussels - Leopoldville - Brussels, franked by Mi. 148, 149, 156, 280, 281, 282 (Image)

1935 Belgian Congo, First Flight Airmail Cover, 1st direct Belgian air connection, Brussels - Banningville - Brussels, franked by Mi. (BC)147, 151, (B) 399, 400 (Image)

1936 Belgian Congo, Airmail Cover, Brussels - Elisabethville - Brussels, franked by Mi. 148, 149, 169 (Image)

1933 Brazil, Airmail Cover, Rio de Janeiro - Bone (Annaba) via Marseille, franked by Mi. 304, 321, 337 (Image)

1931 Bulgaria, Airmail Registered Cover, Sofia - Thessaloniki - Athens, franked by Mi. 242, 245, 246 (Image)

1929 France, First Flight Marseille - Naples - Athens - Syria, Airmail cover, Paris - Corfou, franked by Mi. 168, 222 (Image)

1929 Italy, First Flight Roma - Tunis, Airmail cover, Vatican - Tunis, franked by Mi. 231 (Image)

1930 Poland, First Flight Airmail cover, Warsaw - Bucharest, franked by Mi. 230 (Image)

1931 Suriname, Extra Airmail Shipping from Suriname Airmail cover, Suriname - Curacao, franked by Mi. 159-165 (Full set, Signet) CV $350 (Image)

1938 Uruguay, Registered Airmail cover wit Cinderella, Paybandu - Cleveland, franked by Mi. 4x 548, 565 (Image)

1931 French Guiana, First Flight, Airmail cover, Cayenne - Santurce (Puerto Rico) (Image)