Important Modern and Vintage Timepieces

Hong Kong, Oct 23, 2011

LOT 197

PATEK PHILIPPE REF. 3969 150TH ANNIVERSARY PINK GOLD JUMP HOUR Patek Philippe, Genève, movement No. 752707, Ref. 3969. Made in 1989 in a limited edition of 450 examples in 18K pink gold to celebrate the 150th anniversary of Patek Philippe. Very fine and rare, tonneau-shaped, jump-hour, 18K pink gold wristwatch with an 18K pink gold Patek Philippe buckle. Accompanied by fitted box, Anniversary Medallion, and Certificate of Origin.

HKD 220,000 - 280,000

USD 28,000 - 35,000 / EUR 20,000 - 25,000

C. Two-body, solid, polished and brushed, dedicated case back, sapphire crystal. D. Matte silver with painted radial Arabic numerals for the minutes, aperture for the jump hour at 12, outer minute track. Oxidized gold Breguet minute hand. M. Cal. 215 HG, stamped with the Seal of Geneva quality mark, rhodium-plated, fausses cotes decoration, 18 jewels, straight-line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating freesprung fl at balance spring. Dial, case and movement signed. Dim. 38 x 28 mm. Thickness 8 mm


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Grading System
Grade: AAA

Excellent
Case: 3

Good
Movement: 1*

As new

Overhaul recommended, at buyer's expense
Dial: 1-01

As new

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 fi rst 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.