Commemorative cover with a stamped cachet honoring the Grumman Gulfstream II Shuttle Training Aircraft, signed in felt tip and ballpoint by John Young, Bob Crippen, Vance Brand, Hank Hartsfield, Karol J. Bobko, and Don Peterson. In fine condition. An uncommon grouping with Young included. Pre-certified Steve Zarelli and RR Auction COA.
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