Marine chronometer with sweep center seconds Circa 1970

Unusual electronic marine chronometer by Patek Philippe
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An unusual Swiss metal and aluminium electronic marine chronometer, circa 1970. Retailed by Kelvin Hughes in London, England. A quartz movement. Black matte dial with 24 hour and 12 hour indication, Arabic five minutes, luminous beady minute divisions, sweep center seconds and luminous hands. The square metal and aluminium case is held by two screws within the hinged two tier mahogany deck box with a glazed cover. Case signed by the watchmaker and retailer, movement signed by the watchmaker.
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Width: 180 mm
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Signed: Patek Philippe Geneva