1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON EMERGENCY ENVELOPE IN RED-BROWN TO EARLS COLNE, ESSEX. Good used London emergency envelope in red-brown, several tone spots, addressed to Earls Colne, Essex with KGV ½d and 1d Downey head cancelled good to fine large part strikes FIRST UNITED KINGDOM/AERIAL POST LONDON date stamps SP 15 1911 die 2. (Ref 104410).
