Hong Kong, Nov 25, 2022

LOT 245


HKD 500,000 - 1,000,000

EUR 65,000 - 130,000 / CHF 64,000 - 128,000 / USD 64,000 - 128,000

Sold: HKD 650,000

A very fine, rare and discontinued, platinum, self-winding Pulsomax escapement wristwatch with salmon pink color dial, annual calendar, power reserve indication, moon phases. Made in a limited edition of 300 pieces in 2008.

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Grading System
Case: 1

As new

Movement: 1*

As new

Overhaul recommended, at buyer's expense

Dial: 1-01

As new

HANDS Original

Brand Patek Philippe

Model Advanced Research Annual Calendar

Reference 5450P-001

Year Sold in 2008

Movement No. 3900338

Case No. 4700579

Buckle Platinum PP deployant clasp

Diameter 39mm.

Caliber 324

Signature Dial, case and movement

Accessories PP fitted box, certificate, instruction booklets


Ref. 5450: In 2005, Patek Philippe introduced the first of a series of watches with technical innovations designed to improve accuracy with the reference 5250. This watch featured a Silinvar escape wheel. Then in 2006, the ref. 5350 with Spiromax balance spring and Silinvar escape wheel. In 2008 the ref. 5450 became the third and most advanced of a trilogy with its combination of the new Pulsomax lever and escape wheel made of Silinvar and a Spiromax balance spring made of Silinvar so that all three components of the escapement are made using the new technology. The escapement is therefore completely antimagnetic. The ref. 5450 is a limited edition of 300 pieces made in platinum.

Pulsomax Escapement: The lever is made of Silinvar, a component of silica that has one-third the mass of steel, it is also of very different shape to the usual Swiss lever. The escape wheel is also made of Silinvar, this results in very low friction and eliminates the need for oil. The manufacturing process is called Deep Reactive Ion Etching (DRIE) and this enables each component to be made complete as opposed to requiring the several manufacturing processes involved in making a standard Swiss part. The DRIE process is up to 10 times more accurate than typical machining