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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 One-piece solid wood ring; sloped inward with flat bottom. Center hole is 3.0". Dimensions 3-D: 1.9 x 12.1cm (3/4 x 4 3/4 in.)
Storage: 18.42 x 18.42 x 4.45cm (7 1/4in. x 7 1/4in. x 1 3/4in.)
 Materials Unidentified Wood
Original varnish
 Inventory Number A19820896000 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
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