UPDATE: Read more about Steve Durst.
Group of 12 commemorative covers honoring flights of experimental aircraft including the X-15 and X-24B, each signed in ink by a legendary test pilot. Signers are: Chuck Yeager (2), Scott Crossfield, Joe Engle (2), Pete Knight, Bill Dana, Robert M. White, Robert A. Rushworth (3), and John Manke. In overall fine condition, with some staining to the Crossfield cover.
