FDC with a Colorano silk cachet honoring the 75th anniversary of the Wright Brothers, signed in blue or black ballpoint by Burt Rutan, the designer of the Voyager aircraft, and Dick Rutan and Jeana Yeager, the pilots of the Voyager non-stop round-the-world flight. The cover is also signed by Francis Rogallo, an American aeronautical engineer inventor who, with his wife, Gertrude, is credited with the invention of the Rogallo wing, or 'flexible wing,' a precursor to the modern hang glider and paraglider. In very fine condition.
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