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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 A single, rounded object with a flat base (no elevated rim). There appears to be a circular depression around this base. The center has an elevated, rounded block of wood, 1.075" wide and 2.5" high, with a 1.5"center hole that goes through object to the other side. The reverse side has an elevated inner rim towards the center and an lower 0.5" high outer rim,and a 1.125" wide towards its edge. Dimensions 3-D (Overall): 10.8 × 15.9cm (4 1/4 × 6 1/4 in.)
 Materials Wood
Unknown Coating
 Inventory Number A19820913000 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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