Patek Philippe Perpetual Calendar 5059G-001

--> SPECIFICATIONS Brand: Patek Philippe Model: Grand Complications Perpetual Calendar Retrograde Reference Number: 5059G-001 Movement: Automatic Gender: Men's Condition: Unworn / like new Time Period: 2000s Box: Yes Papers: Yes THE CALIBER Caliber: 315 S-QR Jewels: 31 THE CASE Case Material: 18K white gold Case Diameter: 36 mm Thickness: 13 mm Waterproof: 100 ft./ 30 m./ 3 ATM Bezel Material: Fixed 18K white gold beveled bezel Glass: Slightly domed Sapphire Crystal Caseback: open solid display back Dial: White enamel Dial Numerals: Black Roman numeral hour indices, railway track minute marker around the outer rim with black Arabic numerals every 5 minutes THE BRACELET / STRAP Bracelet Material: Black Leather Clasp: Deployant Fold-over Calatrava cross Clasp material: 18K white gold THE FUNCTIONS Perpetual calendar, retrograde date display centered at 12 o'clock, moon phase display at 6 o'clock, leap year indicator at 12 o'clock, day aperture at 9 o'clock, date aperture at 3 o'clock, hours, minutes and center sweep seconds, 46-hour power reserve. --> FURTHER READING Black oxidized white gold leaf-shaped hour/minute hands, black stick-shaped center sweep seconds, and black arrow hand for the date. The four-body case is polished and brushed with an "Officer style" 18K white gold hinged case back, revealing a sapphire crystal display case back. Straight lugs, gold screwed bars 18K push/pull crown Day and month apertures are in the English language Four correction push-pieces to adjust the calendar indications and the moon phase display: month correction between 3 and 4 o'clock, date correction between 11 and 12 o'clock, moon phase correction between 5 and 6 o'clock, and day of week correction between 6 and 7 o'clock. This unidirectional caliber 315/136 movement is rhodium-plated with fausses côtes embellishment. The Patek Philippe seal, stamped with the Seal of Geneva quality mark, includes a straight-line lever escapement, a shock absorber mechanism, and a 21K gold central ball-bearing rotor. It has a self-compensating free-sprung flat balance spring. It also has the patented Gyromax balance that compensates for cold, heat, isochronism, and five positions. The mechanism oscillates at 21,600 vph (3Hz) This model reference 5059 was introduced in 1998, discontinued in 2007, and replaced by the model ref. 5159 Complete (box and papers)