Patek, Philippe, Genève. The white gold "Calibre 89", the most complicated watch in the world with a total of 33 complications. A spectacular and unique, keyless three-barrel, double dial, astronomical and astrological 18K white gold watch with sidereal time, second time-zone, time of sun-rise and sun-set, equation of time, perpetual calendar, century leap year correction, century, decade and year indication, four year cycle indication, season, equinox, solstice and zodiac indication, star chart, phases and age of the moon, date of Easter indication, split-seconds chronograph, hour and minute recorders, Westminster chime on four gongs, Grande and Petite sonnerie, alarm, up/down indicators for the going and striking train, three way setting indicator, winding crown position indicator, thermometer and Tourbillon regulator. Accompanied by an Extract from the Archives and a fitted hardwood box.\n\nC. four-body, "bassine", polished. D. Front: cream with applied white gold Breguet numerals,retrograde date sector, hour and minute recording dials combined with the power reserve sectors for the going and striking trains, moon phase, year, month, day and four uear cycle apertures, second time-zone, thermometer, winding-crown position indicator, alarm indicator, outer 1/5th seconds scale with five minute/seconds red Arabic markers and subsidiary constant seconds. Blued steel and white gold hands. Back: Silvered with hours of sidereal time, date of Easter sector, sun-rise and sun-set dials, subsidiary sidereal seconds, equaeion of time sector, sun hand and aperture for the star chart. Blued steel and white gold hands. M. Cal. 89, three-barrels on four levels, maillechort, 600grams, "fausses côtes" decoration, 126 jewels, 1728 parts straight-line lever escapement, Gyromax balance, blued-steel Breguet balance spring, adjusted to heat, cold, isochronism and five positions, tourbillion regulator.,Dial side main plate: mechanisms for the chime, alarm, 12-hour recorder and the power reserve indicators, the. Reverse main plate, mechanisms for mean time, the chronograph, the 30-minute recorder and the tourbillon regulator. Plate 2: mechanisms for sidereal time, the season, solstices, equinoxes and solstice, the times of sunrise and set, the equation of time, the date of easter and the star chart. Plate 3: the mechanisms for the secular perpetual calendar, the second time-zone, the phases and age of the moon and the thermometer. Dial, case and movement signed. Diam. 88.2mm, 41.07mm thick (with the crystals), total weight 1100 grams.