This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
National Air and Space Museum
Restrictions & Rights
Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum
Gift of Captain Giffen A. Marr
Aluminum alloy, anodized aluminum, steel, glass, black paint, radium paint, rubber and fiber tube
Approximate: 13.3 × 11.4 × 20.3cm (5 1/4 × 4 1/2 × 8 in.)
Country of Origin
United States of America
4-1/2in. x 4-1/2in. case, 3in. diameter face; vacuum operation.