1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON POST CARD IN OLIVE-GREEN TO SWEDEN. Good London post card in olive-green (one weaker corner) addressed to Stockholm, Sweden with KGV ½d Downey x 2 arranged in tete-beche style cancelled fine strikes FIRST UNITED KINGDOM/AERIAL POST LONDON date stamps SP 13 1911 die 1. On reverse STOCKHOLM receivers 21.9.11. Good overseas usage. (Ref 104430).