1911 FIRST OFFICIAL U.K. AERIAL POST LONDON ENVELOPE IN PURPLE-BROWN TO WINDSOR REDIRECTED TO ABERDEEN. Fine example of the London envelope in purple-brown with insert to 'Mrs. Baird, c/o/ Miss Ashton, Springfield, Windsor', redirected to Aberdeen with KGV 1d Downey tied fine strike 'FIRST UNITED KINGDOM/AERIAL POST/LONDON' date stamp SP 15 1911 Die 2 and alongside 'WINDSOR' date stamp SP 26 11. On reverse 'WINDSOR' date stamp SP 25 11 and 'ABERDEEN' date stamp SP 26 11. (Ref 150759)
