37,760 CHF
"Quantième Perpétuel Biretro" Franck Muller, Genève, "Cintrée Curvex, Quantième Perpétuel Biretro", No. 14, Ref. 6850 CC QPB. Made in the 2000s. Very fine, tonneau-shaped, self-winding, water-resistant, 18K pink gold wristwatch with olive-shaped button chronograph, bi-retrograde perpetual calendar, moon phases and an 18K pink gold Franck Muller buckle. Two-body, solid, polished and brushed, case back secured by 4 screws and engraved “Master of Complication”, domed sapphire crystal. Guilloché silver with painted Arabic numerals, outermost minute track, subsidiary dials for the 30- minute, the 12-hour registers and the months. Sectors for the retrograde days of the months and the week, aperture for the leap year and the moon phases. Luminous blued steel "spade" hands. Cal. 5888 BR, rhodium-plated, "fausses côtes" decoration, 45 jewels, straight-line lever escapement, monometallic balance adjusted to temperatures, shock absorber, selfcompensating flat balance spring. Dial, case and movement signed. Dim. 34 x 47 mm. Thickness 14 mm. Notes What is a Perpetual Calendar? A perpetual calendar is a calendar mechanism which, unlike a simple calendar, automatically adjusts to the correct day of the month by accounting for the varying durations of each month, as well as self-correcting for the 29th of February during leap years. Audemars Piguet are said to have been the first to produce wristwatches with perpetual calendar and moon phases, in 1924. In 1925, Patek Philippe m
Auctioneer:
Antiquorum
Date:
2007-10-14
