Chicago Lighthouse Atomic Slimline Contemporary Clock, 16-1/2 inch, Black

Maintains its accuracy by automatically matching the National Bureau of Standards Atomic Clock in Boulder, Colorado and automatically setting itself to daylight-saving time. Changing of the hour hand saves maintenance labor in facilities with numerous clocks. Larger dial size makes it easier to tell time from a distance. Slimline design gives sleek, modern appearance. Time Format: Standard; Power Source(s): Requires one AA battery (sold separately); Movement Type: Quartz; Overall Diameter: 16 1/2".

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