Ten commemorative covers and FDCs, each bearing cachets relating to aviation, or space exploration signed on the front in ink by various aviation pioneers. Signers are: Oliver C. LeBoutillier, Charles Hampson Grant, E. A. Goff, Paul Garber, Joseph Frantz, Al J. Engel, E. K. Jaqueth, Edward Korn, Russell Holderman, and Melvin Hodgdon. In fine condition with some mild toning to a few covers. RRAuction COA.
