This is a part of the guidance system for the Gemini 3 spacecraft, flown on March 23, 1965, by astronauts Virgil Grissom and John Young. Unlike its predecessor Mercury, the Gemini spacecraft had the ability to change its orbit, which required an on-board inertial guidance system and computer. This unit supplied power to that system.
Transferred from NASA to the National Air and Space Museum in 1973.
Transferred from National Aeronautics and Space Administration