The 'Mercury Seven' were the first US Astronauts (Astronaut Group 1) chosen from 110 Test Pilots in 1959. All of them flew with the Mercury, Gemini, Apollo and Space Shuttle Programms.
The Mercury Seven:
Standing: Alan Shepard, Wally Schirra (signed), John Glenn
Seated: Gus Grissom, Scott
Carpenter, Deke Slayton, Gordon Cooper
Picture: archive.org from NASA,
Autograph bought with COA