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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 This object has a squared base. At the center is a rounded knob with a large, center hole. The center knob is nailed to the squared base. The top part of the squared base is nailed to two pieces on its front and back edges which form aa elevated support stand. The left and right edges have no connection to the sides, nor is there a bottom piece. Dimensions 3-D (Overall): 12.7 × 8.6 × 10.2cm (5 × 3 3/8 × 4 in.)
 Materials Ferrous Alloy
Wood
Paint
Unknown Coating
 Inventory Number A19820937000 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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