dsc31230.jpg

The sign which accompanied the ASTP display.

It read

Apollo-Soyuz Test Project

Displayed here are full-scale units of the Apollo-Soyuz Test Project, the joint U.S.-U.S.S.R. program to develop and test a common spacecraft docking system. The 1975 mission marked the first time manned spacecraft of two nations met in space.

On the left is the Apollo Command and Service Module. This spacecraft was used as a test vehicle during the Apollo program and was restored for display here. In the center is a Docking Module that served as a backup for the Docking Module used during the mission.

On the right is the green Soyuz spacecraft, which includes a spherical orbital module, a bell-shaped landing module, and a cylindrical Service Module. The Soyuz displayed here is a model built by the Energiia Scientific Production Association, the company that still manufactures Soyuz flight vehicles.

Apollo Command and Service Modules transferred from the National Aeronautics and Space Administration

Soyuz Spacecraft from the Energiia Scientific Production Association, Russia

Total Length:	20.4 m (67 ft)
Total Weight:	39,400 kg (86,900 lb)
Manufacturer (Apollo):	North American Rockwell, United States
Manufacturer (Soyuz):	Energiia Scientific Production Assn., Russia
Launch vehicle (Apollo):	Saturn IB
Launch vehicle (Soyuz):	Soyuz

The CSM is Smithsonian catalog ID #A19740798000. The Docking module is Smithsonian catalog ID #A19800430000. I was unable to locate the Soyuz mockup in the Smithsonian's collections database.