[ASTRONAUTS--MERCURY]. Color photograph signed by six (of the seven) members of the Mercury crew: SCOTT CARPENTER, GORDON COOPER, JOHN GLENN, WALTER SCHIRRA, ALAN SHEPARD and DONALD SLAYTON, by NASA, Washington, D.C. (stamped on verso), n.d. [circa 1962]. 202 x 255 mm. (7 15/16 x 10 in.) including margins. A fine color group photograph of the Mercury Astronauts, standing in front of a flight training jet, signed by all but Virgil Grissom.