Hamilton AN 5740 Master Navigation Chronometer

Like World War II era sextants, the periscopic sextant also had a clip for a navigation watch.

Caption:
A post-war periscopic sextant often mounted this type of watch.
Type: Artifact
Image Date: 2012
Credit: National Air and Space Museum, Smithsonian Institution.
Origin: National Air and Space Museum, Smithsonian Institution.
Creator: Eric Long
NASM2012-02149
Navigation Methods
 
A post-war periscopic sextant often mounted this type of watch.