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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.
ca. 1914
United States of America
INSTRUMENTS-Computers, General Purpose
R. J. Hoffman Standard Aeronautical Co.
One "Triple-Slide" calculator with solid back, paper and cardboard slides, and a plastic triangle indicator.
3-D (Main Component): 35.1 × 29.7 × 0.6cm (13 13/16 × 11 11/16 × 1/4 in.)
WoodCardboardFabricPaperInkAdhesivePlasticAluminumCopper Alloy
A19350008000
National Air and Space Museum
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