Fantastic official NASA brochure from April 1959, headed "Project Mercury: Research Providing Valuable Data for Manned Space Flight," four pages, 8 x 10.5, signed in ink by the original 'Mercury Seven' astronauts: Scott Carpenter, Gordon Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard, and Deke Slayton. The brochure depicts each of the Mercury 7 astronauts and provides progress reports on research and development of the Project Mercury spacecraft, documenting water drop tests, escape system trials, wind tunnel analysis, and parachute development. In fine condition, with generally poor-to-moderate contrast to the signatures. Accompanied by a letter of provenance stating that this signed brochure was given by Alan Shepard to Jewel Spangler Smaus, a family friend and co-author of the book America's First Spaceman (Doubleday, 1962).
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