1911 FIRST U.K. AERIAL POST LONDON EMERGENCY ENVELOPE IN DARK BROWN TO SWITZERLAND WITH KING EDWARD VII AND KING GEORGE V ISSUES. Fine London emergency envelope with insert to Neuchatel, Switzerland, franked King Edward VII ½d green and King George V 1d Downey x 2 with two fine strikes 'FIRST UNITED KINGDOM/AERIAL POST/LONDON' date stamp SP 15 1911 Die 3. On reverse 'NEUCHATEL' date stamp 26 9 11. Very fine overseas usage. (Ref 141327).
