1911 FIRST OFFICIAL U.K. AERIAL POST/"LONDON FORWARD" PRINTED BUNDLE LABEL. A fine example (76 x 115) inscribed "TO London Forward" signed "SAR" (S. A. Roberts who was Chief Aerial Post Officer) and with fine strike FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 13 1911 die 1. These tags were used to "pre-sort" mail for onward delivery. Light creasing but very scarce. (Ref 102851).