1911 FIRST OFFICIAL U.K. AERIAL POST PRIVILEGE POST CARD SIGNED BY THE PILOT GRESWELL. Superb example of this very scarce post card in violet Windsor to "Williamson Secretary's Office, G.P.O" with KEDVII ½d cancelled superb strike FIRST UNITED KINGDOM/AERIAL POST WINDSOR date stamp SP 16 1911 die 1 and alongside CRICKLEWOOD receiving office date stamp SP 18 11. Signed by the pilot Greswell. A stunning item. (Ref 102690).