Rare Swiss 18K gold complicated pocket watch Circa 1985

Gold keyless lever watch with complications by Audemars Piguet
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An attractive and rare Swiss gold keyless-winding pocket watch with a perpetual calendar and moon phases, circa 1985.
Rhodium-plated movement, Geneva striping, twenty jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and five positions, self-compensating flat balance spring, shock absorber. White enamel dial with painted Roman numerals, outer minute track, subsidiary dials for the months and four-year cycle, days of the week and date, aperture for the moon phases, and original blued steel cathedral hands. Polished and brushed 18K yellow gold round-shaped case, stepped curved bezel, brushed band, hinged bow, cabochon sapphire set winding crown, sapphire crystal. Dial, case and movement signed.
Accompanied by an original fitted box and an 18K yellow gold setting pin.
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Diameter: 49 mm
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Signed: Audemars Piguet Swiss made