CIRCA: 2000s
CASE MATERIAL: 18k White Gold
DIAL: Silver
MOVEMENT: Automatic
FUNCTIONS: Annual Calendar, Moon Phases, Power Reserve
BOX: Yes
ACCESSORIES: 18k White Gold Patek Philippe Buckle, Sealed Travel Box Box, Patek Philippe Presentation Box

ψ Please note the endangered species strap is shown for display purposes only and is not for sale. Upon sale, this watch bag will be cut and the watch will be supplied to the buyer with a non CITES strap (not shown). For further information please refer to the Conditions of Sale.

Please note this lot is the property of a private individual.
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Lot Essay

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.

To the best of our knowledge, this lot has never been offered at auction and is fresh to the market

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