Swiss center seconds quartz chronometer with power reserve Circa 1986

Mahogany Naviquartz III by Patek Philippe
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A very fine Swiss mahogany quartz chronometer with centre seconds, stop feature and battery power reserve indicator, circa 1986. With quartz standardisation, electronic hack mechanism for stopping for precision setting. White enamel dial with bold Roman numerals, outer minute track, below on the brushed brass dial plate two apertures, right for push button activating power reserve indication, left for the indicator and original black Breguet hands. Hinged box, corners and sides reinforced by brass inlays in the tradition of marine chronometers, the interior of the lid with applied vacant brass plaque, bottom with folding brass stand. Dial and movement signed.
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Dimensions: 158 x 123 mm
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Signed: Patek Philippe Genève
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Missing brand/name plate.