Complete set of seven Challenger postal covers, some bearing commemorative cachets, each postmarked January 28, 1986, and individually signed in black ink or felt tip by an STS-51-L astronaut, including: “Greg Jarvis, 51-D,” “S. Christa McAuliffe,” “Dr. Ron McNair,—Shuttle Astronaut,” “Ellison S. Onizuka, Feb. 6, 1979,” “Judith A. Resnik,” “Michael J. Smith,” and “Dick Scobee.” In overall fine to very fine condition.
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