PATEK PHILIPPE. A FINE AND RARE 18K WHITE GOLD LIMITED EDITION AUTOMATIC ANNUAL CALENDAR WRISTWATCH WITH MOON PHASES, POWER RESERVE, SILICON ESCAPE WHEEL AND ORIGINAL CERTIFICATE
Prospective purchasers are advised that several co… Read more
PATEK PHILIPPE. A FINE AND RARE 18K WHITE GOLD LIMITED EDITION AUTOMATIC ANNUAL CALENDAR WRISTWATCH WITH MOON PHASES, POWER RESERVE, SILICON ESCAPE WHEEL AND ORIGINAL CERTIFICATE

SIGNED PATEK PHILIPPE, GENEVE, ADVANCED RESEARCH, ANNUAL CALENDAR MODEL, REF. 5250, MOVEMENT NO. 3'636'074, CASE NO.4'339'176, MANUFACTURED IN 2006

Details
PATEK PHILIPPE. A FINE AND RARE 18K WHITE GOLD LIMITED EDITION AUTOMATIC ANNUAL CALENDAR WRISTWATCH WITH MOON PHASES, POWER RESERVE, SILICON ESCAPE WHEEL AND ORIGINAL CERTIFICATE
SIGNED PATEK PHILIPPE, GENEVE, ADVANCED RESEARCH, ANNUAL CALENDAR MODEL, REF. 5250, MOVEMENT NO. 3'636'074, CASE NO.4'339'176, MANUFACTURED IN 2006
Cal. 315/266 automatic lever movement stamped with the Geneva seal, 36 jewels, Gyromax balance, silicon escape wheel, brushed silvered dial, applied baton and Arabic numerals, luminous accents, luminous hands, sweep centre seconds, two subsidiary dials for day and month, window for date, aperture for moon phases, power reserve indicator, circular case, glazed screw back with integrated loupe and with inscription Patek Philippe Advanced Research, 18k white gold Patek Philippe deployant clasp, case, dial and movement signed
39 mm. diam.
Special Notice
Prospective purchasers are advised that several countries prohibit the importation of property containing materials from endangered species, including but not limited to coral, ivory, tortoiseshell and crocodile. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country.

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Lot Essay

US$52,000-85,000

With Patek Philippe Certificate of Origin dated February 2006, setting pin, instruction manual, product literature, leather envelope, fitted presentation box and outer packaging.

According to our research, the present watch is one of only 6 examples to have appeared at auction to date and is furthermore preserved in "new old stock" condition.

The Advanced Research department at Patek Philippe is responsible for horological improvements and technical innovations. One of their important developments in recent years is the creation of silicium, forged using the ultra-modern DRIE (Deep Reactive Ion Etching) process. Previously, hair springs were crafted from carbon steel, a material that is susceptible to magnetism, oxidation or rust and temperature variations. Modern-day silicium contributes greatly to the precision that Patek Philippe prides itself on, as it has non-magnetic, non-oxidisation properties, reduced mass, is not affected by temperature and has reduced sensitivity as it is three times lighter than conventional springs.

Following in the footsteps of this range's previous references, silicium is used in the references 5250 (the present lot), 5350 and 5450. With the most current reference, the three most important components of the escapement - the hairspring, the balance wheel and the anchor or pallet fork - are now in silicium or Silinvar, as Patek Philippe has named it. With the use of the revolutionary Silinvar Spiromax spring, Patek Philippe has ventured one step closer to perfection - the spring is isochronous regardless of temperature, movement orientation or magnetic presence.

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