Patek Philippe. A fine and rare 18K pink gold limited edition automatic annual calendar wristwatch with power reserve indication, moon phases, original certificate and box
Prospective purchasers are advised that several co… Read more
Patek Philippe. A fine and rare 18K pink gold limited edition automatic annual calendar wristwatch with power reserve indication, moon phases, original certificate and box

SIGNED PATEK PHILIPPE, ADVANCED RESEARCH, ANNUAL CALENDAR MODEL, REF. 5350, MOVEMENT NO. 3'686'044, CASE NO. 4'375'136, MANUFACTURED IN 2007

Details
Patek Philippe. A fine and rare 18K pink gold limited edition automatic annual calendar wristwatch with power reserve indication, moon phases, original certificate and box
Signed Patek Philippe, Advanced Research, Annual Calendar model, ref. 5350, movement no. 3'686'044, case no. 4'375'136, manufactured in 2007
Cal. 324 S IRM QA LU nickel-finished lever movement stamped with the Geneva seal, 36 jewels, Gyromax balance, Silinvar Spiromax balance spring, silicon escape wheel, brushed silvered dial, applied pink gold baton and Arabic numerals, luminous hands, sweep centre seconds, two subsidiary dials for day and month, apertures for date and moon phases, power reserve indicator, circular water-resistant-type case, screw glazed display back with integrated loupe and engraved inscription Patek Philippe Advanced Research, 18k pink 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 and tortoiseshell. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country. Christie's has provided a minimum price guarantee and has a direct financial interest in this lot. Christie's has financed all or a part of such interest through a third party. Such third parties generally benefit financially if a guaranteed lot is sold. See the Important Notices in the Conditions of Sale for more information.

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Lot Essay

With Patek Philippe Certificate of Origin dated 31 May 2007, Advance Research Certificate of Origin confirming the production of this reference limited to 300 pieces only. Furthermore delivered with booklet, fitted veneered presentation box and outer packaging.

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, 5350 (the present lot) 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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