1911 FIRST OFFICIAL U.K. AERIAL POST/"REMINGTON" ADVERTISEMENT - SHEFFIELD OFFICE. A superb London post card in red-brown from London to Sheffield with KGV ½d Downey cancelled fine FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 9 1911 die 4. On reverse very fine advert in red and black "FIRST POSTAL MESSAGE BY AEROPLANE POST...REMINGTON TYPEWRITER COMPANY/Manufacturers of THE FIRST TYPEWRITER...Please keep this card, not merely as an historic document, but also as a timely reminder that REMINGTON MEANS THE LATEST AND BEST IN TYPEWRITER CONSTRUCTION.". At lower right "Sheffield Office -/1 LEOPOLD STREET". Most Remington adverts are from the London office, those from the provinces are much scarcer. (Ref 103290).