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I have no clue what this is... Answered

 With a sequence of click-click-click-click-click pause X'3? ( with an initial click-click ), I'm thinking that this electrical dial was for an alarm, then again it may not be as part of a warning/alert system at all. 

Given to my dad by his dad who served in the navy in Nam.

Here's a link to a video I uploaded to YouTube.




can you take pictures from all sides?
Is there a NSN or FSN number on it? or MK #

Are there any signs that it could drive or release another mechanism?

Could take stills of all six faces - front, back, side, top & bottom?

Any clue to maybe what kind of ship grandpa served on? Could range from timers used for munitions, aircraft landing/drop timers, instrumentation or navigation or signaling aids to cooking an egg?