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National Air and Space Museum Collection
A flat, circular base is present with a distinct, elevated outer ring. Betweem this outer ring and a large rounded knob in the center is an inner ring toward the base of the knob. Multiple holes on the top of the knob indicate that something was nailed on it for support.
Transferred from the Smithsonian Institution to the United States National Museum.
Country of Origin
United States of America
3-D (Overall): 11.4 × 10.2cm (4 1/2 in. × 4 in.)
National Air and Space Museum
Restrictions & Rights
Usage conditions apply