Two covers with stamped cachets honoring the 25th anniversary of Yeager's supersonic flight, postmarked at Edwards, CA, on October 14, 1972, both signed in black ballpoint, "Charles E. Yeager, B/Gen USAF." He corrects an error on one of the cachets, crossing out "Buck" and writing "Chuck." In fine condition. Accompanying collector's notes state that they were signed by Yeager in 1972-73.
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