Black cylindrical body with four-point panel mount, radium painted scale ranging from 5 to 3500 u/min, and threaded curved extension and printed data label on reverse side.
Created by
Jason A. Smith
Date Created
10/13/2017
Source
National Air and Space Museum, Smithsonian Institution.
Keywords
Aviation; Instruments
Rights and Restrictions
Usage conditions apply For more information, visit the Smithsonian’s Terms of Use.