Audemars Piguet Royal Oak Quantième Perpétuel Automatique
Made in a limited edition of only 25 examples in the 1990s. Octagonal, astronomic, skeletonized, self-winding, water-resistant, 18K pink gold and platinum gentleman's wristwatch with perpetual calendar, phases and age of the moon and an 18K pink gold and platinum Audemars Piguet bracelet with deployant clasp. Three-body case, solid, polished and brushed, octagonal platinum bezel set with 8 hexagonal nuts embanked in 8 screws on the case back, transparent case back, sapphire crystals. Transparent dial, subsidiary white ring dials for the days of the month, of the week, the months and the age of the moon, aperture for the moon phases. Pink gold "bâton" hands. Movement: Caliber 2120/ 4, gilt brass, hand-engraved and skeletonized, 38 jewels, straight line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock-absorber, self-compensating freesprung flat balance-spring, hand-engraved and skeletonized rotor with 21K gold segment. Diameter 39 mm. Thickness 9 mm.