NASA Apollo 18 - Soyuz 19 "ASTP" Wall Clock Version 1

NASA "National Aeronautics Space & Administration" Apollo 18 - Soyuz 19 "Apollo-Soyuz Test Project" Wall Clock

Apollo 18 "ASTP" & Soyuz 19 "ASTP" - July 15, 1975 - July 24, 1975

USA American Flight Crew - Thomas P. Stafford, Vance D. Brand, & Donald K. "Deke" Slayton
USSR Soviet Flight Crew - Alexey Leonov & Valeri Jubasov

Apollo-Soyuz Test Project - 1972-1975:

On May 24, 1972, US President Richard M. Nixon and Soviet Premier Alexei Kosygin signed an agreement calling for a joint manned space mission, and declaring intent for all future international manned spacecraft to be capable of docking with each other. This authorized the Apollo-Soyuz Test Project (ASTP), involving the rendezvous and docking in Earth orbit of a surplus Apollo Command/Service Module with a Soyuz spacecraft. The mission took place in July 1975. This was the last US manned space flight until the first orbital flight of the Space Shuttle in April 1981.

The mission included both joint and separate scientific experiments, and provided useful engineering experience for future joint US–Russian space flights, such as the Shuttle–Mir Program and the International Space Station.