Desirable FDC with a cachet honoring the first supersonic flight made by Captain Chuck Yeager in 1947, postmarked on the flight's 50th anniversary at the Edwards Air Force Base on October 14, 1997, signed in ink or felt tip six notable test pilots: "Chuck Yeager," "Gus Lundquist, Bell X-1 Test Pilot," "John H. Griffith, NACA," "Scott Crossfield," "Bob Hoover, USAF Bell X-1 Back Up & Chase Pilot, Oct. 14, 1947," and "H. A. Hanes, M/Gen USAF (Ret.) 'Dude.'" In fine condition.
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