250mm l;has pressure gage,range 0-76 cm of hg;gyroscopic Marine sextant with a gyroscopic artificial horizon, manufactured by Ponthus & Lepetit of Paris, France. Created by 2015 NASM Mass Digitization Production Project (Ortery system) Date Created 11/10/2015 Source National Air and Space Museum, Smithsonian Institution. Keywords Aviation; Instruments Rights and Restrictions Not determined
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