Lot 463: Collection of six commemorative covers with stamped cachets honoring the X-15, each signed in ballpoint or fountain pen by one of the plane's pilots, including: John B. McKay, Robert White, Joe Engle, Robert Rushworth, Milt Thompson, and Joe Walker. In overall fine condition. From the Leon Ford Collection.
RR Auction's Fine Autographs and Artifacts Auction 453
Sunday, 17th May 2015
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