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
Transferred from the Department of Commerce
- Aluminum Alloy
- Radium Paint
3-D: 5.7 × 9.5cm (2 1/4 × 3 3/4 in.)
Country of Origin
United States of America
97mm diameter, 60mm long; bright metal case; range 0 to 15000, 1929.