Lot No. 188 (95th Auction)
Patek Philippe Genève, Movement No. 3900331, Case No. 4429103, Ref. 5450P-001, Cal. 324/268, 39 mm, circa 2009

A gentleman's nearly as new, extremely rare, astronomical automatic Geneva wristwatch - "Advanced Research" - limited edition to 300 pieces - annual calendar with day and month indicator, date aperture, moon phase and power reserve indicator in a platinum case - with original box, Patek Philippe certificate, operating instructions and accessories
Case: platinum, glazed exhibition screw back inscribed "Patek Philippe Advanced Research" with cyclops magnifier over the silicon escape wheel, PPC platinum deployant clasp. Dial: salmon gilt, applied black nickel-plated white gold indexes/Arabic numerals, black nickel-plated white gold leaf hands with luminescent coating. Movm.: gold rotorwind movement, Geneva quality hallmark, Gyromax balance.

Patek Philippe launched reference 5450 Advanced Research during Baselworld 2008 - a limited edition of 300 pieces fitted with the exclusive Pulsomax escapement, a silicon escape wheel and a Spiromax balance spring made of Silinvar. The new design brought with it a number of improvements: an improved isochronism lead to higher accuracy and the efficiency of both the Swiss lever escapement and the power reserve was enhanced by 30%. This provides better amplitude stability as well as better long-term accuracy.
Typical features of the watch are the applied indexes and the three Arabic numerals on the salmon-coloured dial. They are made in black nickel-plated 18K white gold, as are the beautifully curved luminescent leaf hands.
Estimate  80,000 - 100,000 €
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