5-1/2in. long, 3-3/4in. wide, 3/4in. thick; c.1918. Created by 2015 NASM Mass Digitization Production Project (Ortery system) Date Created 11/03/2015 Source National Air and Space Museum, Smithsonian Institution. Keywords Aviation; Instruments Rights and Restrictions Not determined
For more information, visit the Smithsonians Terms of Use.