Collection of twenty-one covers honoring the test flights of NASA experimental aircraft including lifting bodies and X-planes, each signed by a pilot, including: Donald Sorlie, Milt Thompson (2), Bill Dana (7), Forrest Peterson, Cecil Powell (2), R. C. Hoag, Jerry Gentry (2), and John Manke (5). Also includes a cover signed by Space Shuttle manager Robert F. Thompson and six unsigned covers. In overall fine condition. Pre-certified Zarelli Space Authentication.
This item is Pre-Certified by STEVE ZARELLI
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