1911 FIRST OFFICIAL U.K. AERIAL POST/POST CARD TO FRANCE/ROYAL AERO CLUB ADVERT. Good used London post card in olive-green to Neuilly, Sur Seine, France with KGV 1d Downey cancelled very fine large part strikes FIRST UNITED KINGDOM/AERIAL POST LONDON date stamps SP 9 1911 die 1. Post card slight soiling but on reverse very fine "1901 : TEN YEARS : 1911 : PROGRESS :/With the Compliments of F. HEDGES BUTLER Founder of the ROYAL AERO CLUB" with illustrations of a balloon and a bi-plane. Very unusual advert going overseas. (Ref 104369).