GEMINI SPACECRAFT ROCKET ENGINE.
A flight-qualified rocket engine, manufactured by Rocketdyne, model SE-6, steel, other metals, and ablative material, 10 inches long and 5 inches wide at the upper mounting bracket. Identification marks on the engine chamber read: "208129, 20602-04989" with numerous inspection stamps below these numbers. The fuel and oxidizer valve assemblies intact and with their electrical connectors.
Provided attitude and maneuvering control for the Gemini spacecraft. A set of 8 of these bi-propellant engines were located in the equipment section aft of the crew compartment which was part of the Orbit Attitude and Maneuver System (OAMS). Pitch, roll, and yaw spacecraft torques were obtained by firing these engines in pairs. Sixteen additional SE-6 engines made up the Reentry Control System (RCS) in the nose of the Gemini spacecraft. These engines produced 25 pounds of thrust. Each engine assembly consisted of a fuel and oxidizer valve with injection systems, a combustion chamber, and expansion nozzle.
The engine has been signed by Wally Schirra and Tom Stafford with each adding "GT-6." The SE-6 engines on their Gemini 6 spacecraft assisted these astronauts in performing the world's first manned space rendezvous with Gemini 7 in December 1965.