![](http://www.alamy.com/thumbs/6/3907A7D0-0516-4265-845B-27907FE62116/2GGBN50.jpg)
82mm diameter, 85 long; panel mount broken mount.
Size: 3648px × 3648px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -magnetic, -meter, 20th, accelerometer, air, alloy, aluminum, america, american, art, aviation, black, century, close, close-, color, colour, company, concept, country, dial, division, education, educational, flight, glass, grease, heritage, institution, instrument, instruments-flight, location, machine, management, measurement, metal, museum, nasm, national, object, paint, panel, part, pencil, pioneer, plating, rubber, scientific, smithsonian, space, speed, states, steel, united, unknown, usa