FDC featuring the four-cent 'U.S. Man in Space, Project Mercury' postage stamp, postmarked at Cape Canaveral on its day of issue, February 20, 1962, signed in felt tip and ballpoint by six of the seven Project Mercury astronauts: "Alan Shepard," "John Glenn," "Scott Carpenter," "Wally Schirra," "Gordon Cooper," and "D. K. Slayton." In fine condition.
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