Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
1887-1903
Country of Origin
United States of America
Type
EQUIPMENT-Test
Manufacturer
Smithsonian Institution
Physical Description
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.
Dimensions
3-D (Overall): 11.4 × 10.2cm (4 1/2 in. × 4 in.)
Materials
Wood
Leather
Copper Alloy
Ferrous Alloy
Inventory Number
A19820933000
Credit Line
Transferred from the Smithsonian Institution to the United States National Museum.
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
For more information, visit the Smithsonians Terms of Use.