Panel mounted instrument with three mounting holes in bezel. Painted overall low gloss black. Circa 1930s Deco style face with 4 vertical bars. Two wire connection posts on back. Scale reads 0 to 30 volts in one volt increments. Created by Smithsonian National Air and Space Museum Date Created 03/09/2022 Source Smithsonian National Air and Space Museum Keywords Aviation; Instruments Rights and Restrictions Not determined
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