3 3/4in. diameter; grey painted steel case with 24-hour steel navigation watch.

---

Size: 5616px × 3744px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -ferrous, ., 1940s, 20th, adamson, air, art, brass, casesteel, century, chronometer, color, colour, company, decade, education, educational, felt, forties, george, glass, hamilton, heritage, institution, instrument, instruments-navigational, machine, machinery, metal, museum, nasm, national, navigation, object, paint, scientific, smithsonian, space, steel, technology, watch