Vintage art deco light meter.  The gauge moves around in light so I assume it still works.  More of a conversation piece unless you know how to use it.  Pretty cool. 

This Kodak Kodalux Exposure Meter Light Meter is a must-have for any photographer who values precision. The compact design makes it easy to carry around, and its accuracy is unparalleled. Whether you're shooting film or digital, this light meter will help you get the perfect exposure every time.

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