Truly unique postal cover bearing a ‘Teacher in Space, NASA’ color sticker, postmarked January 28, 2011, signed in black felt tip, “S. Christa McAuliffe.” Given to McAuliffe to sign before the tragic Challenger mission, the collector then sent the uncancelled cover to the Kennedy Space Center post officer for the postmarked date, which marks the 25th anniversary of the STS-51L Challenger explosion. The stamp used features an image of the Challenger. In fine condition. Pre-certified Steve Zarelli and RR Auction COA.
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