Swiss gold perpetual calendar keyless watch Circa 1989

Gold perpetual calendar watch
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A fine Swiss yellow gold open faced perpetual calendar keyless watch, circa 1989, manual winding lever movement, 20 jewels
White enamel dial, Roman numerals, squelette hands, outer minute track, 4 subsidiary dials for day, date, month combined with leap year indication in English and moon-phases with constant seconds, fan-form aperture for moon-phases, 18k yellow gold circular case with stepped bezel, cabochon sapphire winding crown, case, dial and movement signed.
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Diameter: 48 mm
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Signed: Audemars Piguet
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Accompanied by an Audemars Piguet certificate, presentation case and setting pin.