PROJECT MERCURY]. Project Mecury first day cover. [U, postmark CC, 20 February 1962). SIGNED BY SCOTT CARPENTER, GORDON COOPER, JOHN GLENN, WALLY SCHIRRA, ALAN SHEPARD, AND D. K. SLAYTON. Commemorates the first day of issue for the 4 cent Project Mercury stamp, uncacheted.
PROJECT MERCURY]. Project Mecury first day cover. [U, postmark CC, 20 February 1962). SIGNED BY SCOTT CARPENTER, GORDON COOPER, JOHN GLENN, WALLY SCHIRRA, ALAN SHEPARD, AND D. K. SLAYTON. Commemorates the first day of issue for the 4 cent Project Mercury stamp, uncacheted.
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