1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON ENVELOPE IN PURPLE-BROWN. Good used example of the London envelope in purple-brown, minor imperfections but with insert, to London? with KGV 1d Downey head cancelled fair strike FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 9 1911, die unclear. Writer states "If the flying man accomplishes this feat without accident this will be one of the wonders of this year that will not soon be forgotten...". (Ref 114467).