4-3/8in dia;black case & face w/white markings;;o/a dia5.

---

Size: 3648px × 3648px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -magnetic, 20th, air, airspeed, alloy, america, american, art, aviation, black, cash, century, close, close-, color, colour, company, concept, copper, corporation, country, dial, education, educational, element, flight, gauge, glass, heritage, indicator, institution, instrument, instruments-flight, location, management, measurement, metal, museum, nasm, national, ncr, object, paint, panel, pressure, register, scientific, smithsonian, space, speed, states, united, usa, white