Importantes Montres de Collection

Geneva, May 15, 2011

LOT 562

PATEK PHILIPPE SEALED REF. 5350R, PINK GOLD , ADVANCED RESEARCH LIMITED EDITION Patek Philippe, Genève, movement No. 3686126, case No. 4375230, Ref. 5350R. Made in a special edition of 300 pieces in 2007, sold on April 7th, 2008. Very fine, rare and innovative, center seconds, self-winding, water-resistant, 18K pink gold wristwatch with annual calendar, power reserve indication, moon phases, silicon escape wheel, Silinvar Spiromax balance spring and an 18K pink gold Patek Philippe deployant clasp. Accompanied by the fitted box, Certificate of Origin, setting pin and booklets.

CHF 50,000 - 70,000

USD 55,000 - 77,000 / EUR 38,000 - 55,000

Sold: CHF 68,500

C. Two-body, solid, polished, glazed screwed-down case back with cyclops lens over escape and balance wheels, rounded bezel, correctors in the band, concave lugs, sapphire crystals, back crystal inscribed: Patek Philippe Advanced Research. D. Satine silver with applied pink gold baton indexes and Arabic quarter hour numerals, luminous dots, outer minute track, subsidiary dials for the days of the week, the months, apertures for the moon phases and the date at 6, up and down indication below 12. Luminous pink gold feuille hands. M. Cal. 324/267, stamped with the Seal of Geneva quality mark, rhodium plated, fausses cotes decoration, 36 jewels, straight line lever escapement with silicon escape wheel, the bridge with additional milled opening, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating free-sprung Silinvar Spiromax balance spring, 21K gold rotor with zirconium ball bearings. Dial, case and movement signed. Diam. 39 mm. Thickness 12 mm


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Case: 1

As new
Movement: 1

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Dial: 1-01

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HANDS Original

Notes

Spiromax is a totally new type of balance spring made of ?Silinvar?, a revolutionary material based on monocrystalline silicon. It was developed by two partners in the Swiss watch industry and a leading research institute. The Advanced Research Department at Patek Philippe developed a new terminal curve design using the Silinvar balance spring. The patented Patek Philippe terminal curve is noticeably thicker at the outer end, forcing concentric development upon the Spiromax spring. This causes the expansion and contraction of the spring to be symmetric relative to its center over the entire plane of oscillation. The Patek Philippe terminal curve lies within this plane and can be crafted three times thinner than a spring with a Philips or Breguet overcoil, thus facilitating the construction of very thin movements. The reference 5350 uses the silicon escape wheel first found in the ref. 5250 launched in 2005. The advantages of using silicon is that it is anti-magnetic, very hard, lightweight and corrosion-resistant, above all the locking tooth faces never need to be lubricated.