This is a 1:32 scale model of the the Atlas B intercontinental ballistic missile. The Atlas B (also designated XSM-65B) was the second version of the missile and was used exclusively as a test missile in the program. On 18 December 1958 an Atlas B also launched a communications satellite under Project SCORE. Atlas Ds, Es, and Fs were America's first operational intercontinental ballistic missiles and were deployed by the Strategic Air Command from 1960-1965. General Dynamics, the missile's manufacturer, built this model and donated it to NASM in 1962.
This object is on display in James S. McDonnell Space Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.