Two different commemorative covers, 7.5 x 3.75, from the International Aerospace Hall of Fame Pioneers of Flight series honoring Alan Shepard and Baron Manfred von Richthofen, respectively. The first cover is signed in ink or felt tip by Alan Shepard, Chuck Yeager, J. H. Doolittle, and President Gerald Ford; the second cover is signed by Doolittle, Yeager, and Ford. In fine condition, with bleeding to Yeager’s signature on one envelope and light edge toning. Accompanied by two biographical cards and an original mailing envelope. RRAuction COA.
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