Netherlands, 1928 (Nov 27), John Carberry Flight, Amsterdam - Cairo, pictorial envelope featuring Carberry''s plane, "Miss Africa" franked with two special labels tied by Schipol Aerodrome, Amsterdam boxed flight cachets/cancels; addressed to Carberry in Cairo and reposted to London with Egyptian stamp tied on the reverse by Dec 6 Cairo machine cancel. Numbered 9 of only 40 covers were carried. Muller 62.
Estimate $150 - 200.