1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON POST CARD IN BROWN/MIXED REIGN USAGE. Very fine London post card in brown addressed to Colchester with most attractive combination of King Edward VII 4d orange and KGV ½d Downey in green cancelled with a superb single strike FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 12 1911 die 2. On reverse COLCHESTER receivers cds SP 19 11. Superb usage. (Ref 104441).