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[Letter and first flight air mail cover addressed to William E. Boeing, from Thomas F. Hamilton, United Aircraft Corporation, May 23, 1939]
Letter and first flight air mail cover addressed to William E. Boeing, from Thomas F. Hamilton, United Aircraft Corporation, May 23, 1939. Sends greetings by first transatlantic air mail service. One typed page and air mail cover.Stamped: "1st Service Postal - Aerien - France - Etats - Unis."
[Commemorative letter and air mail cover honoring 25th anniversary of Glenn L. Martin's flight from Newport Bay, California to Avalon, Catalina Island, May 10, 1937]
Commemorative letter honoring the 25th anniversary of Glenn L. Martin's record-making flight from Newport Bay, California to Avalon, Catalina Island, then the longest over-water flight in aviation history, May 10, 1937. One typed page on Glenn L. Martin Company stationery with air mail cover addressed to William E. Boeing.Stamped cachet: "25th Anniversary - First Flight to Catalina Island."
[Letter and first flight air mail cover addressed to William E. Boeing and Bertha Boeing from J. Parker Van Zandt, May 10, 1937]
Letter to William E. Boeing and Bertha Boeing from J. Parker Van Zandt, May 10, 1937. Sends greetings and hopes this will be added to Boeing's first flight collection. One handwritten page with first flight air mail cover.Stamped cachet: "Primeiro Voo – Correio - Transpacific - Macau-USA."
[Letter and air mail cover addressed to William E. Boeing from Merl LaVoy, U.S. Consulate, Johannesburg, South Africa, August 2, 1938]
Letter to William E. Boeing from Merl LaVoy, U.S. Consulate, Johannesburg, South Africa, August 2, 1938. Includes centenary commemorative envelope with a cachet illustration depicting the Great Trek of 1838 by the Voortrekker [Dutch-speaking settlers] from Cape Colony into the interior of South Africa. LaVoy notes that first one thousand miles of the letter's trip was via ox cart, while the rest…