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National Air and Space Museum Collection
A circular object with flat base and rounded knob in the center which is 1.5" wide and 1.0" high. Once reversed, the object reveals a slightly elevated, rim which gives way to a flatten area with a hole in the middle. The hole indicates a possible means for attaching itself to some support base or mechanism.
Transferred from the Smithsonian Institution to the United States National Museum.
Country of Origin
United States of America
3-D: 4.1 x 13.3cm (1 5/8 x 5 1/4 in.)
Storage: 15.88 x 15.88 x 5.72cm (6 1/4in. x 6 1/4in. x 2 1/4in.)
National Air and Space Museum
Restrictions & Rights
Usage conditions apply