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. Pre-certified Steve Zarelli Space Authentication.
This item is Pre-Certified by STEVE ZARELLI
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