Coronation Flight 1911, First UK Aerial Post by sanction of H.M. Postmaster General, First Flight London - Windsor - London, printed card (green-olive) franked with 2 x ½ Penny green and cancelled with special aerial postmark London 09-14 flown to Windsor and addressed to Sialkot/India, arrival cachet 10-08, some imperfections but very unusual destination, certified Bolaffi
6; Flugpost; FLUGPOST INTERNATIONAL; Großbritannien