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Patek Philippe Annual Calendar, 5450 Advanced Research Platinum
Patek Philippe 5450, Ref. 5450P-001, Platinum on a Strap with an Platinum Deployant Buckle, Automatic Movement, Annual Calendar, Day, Date, Month, Moonphases, Power Reserve Indicator, Centered Sweep Seconds Hand, Salmon Dial with Applied Numerals, Diameter: 39 mm, Thickness: 11.2 mm, Sapphire Crystal, Display Back with Magnifier, Water Resistant to 2.5 atm, Baselworld 2008 release from Patek Philippe Advanced Research division. LIMITED EDITION of 300 pieces featuring the exclusive Pulsomax® escapement, escape wheel made of silicon-based Silinvar® and a Spiromax® balance spring also made of Silinvar®. These innovations have resulted in: increased reliability without lubrication; rate accuracy optimization based on improved isochronism; increased efficiency of the Swiss lever escapement; and an increased power reserve (up 30% from more efficient escapement). The result is greater amplitude stability, and longer-term rate accuracy. New with Box and Papers.
More about Annual Calendar, 5450 Advanced Research Platinum
This is a platinum Patek Philippe Advanced Research Annual Calendar 5450P-001. The alligator leather strap has a platinum double-folding deployment clasp, and scratch resistant sapphire crystals. There is a screw-down signed winding crown with crown guards, and it has four correctors for the annual calendar on the case bands including two at 8 and 10 o'clock on the left side, and two more at 2 and 4 o'clock on the right. The screw down exhibition sapphire dispay case back has black letter printed on the crystal inscribed: "Patek Philippe Advanced Research." The 39mm solid two-body case, curved lugs, and stepped convex bezel, are polished. It has a golden-salmon colored dial and applied charcoal white gold Breguet-style Arabic numeral hour markers at 3, 9, and 12 o'clock. and baton indexes with luminous white end pips. It includes charcoal white gold feuille leaf hands with luminous inserts, a center sweep second hand, and a black perimeter railway-style minute/seconds scale. It includes a hemispherical moon phase sub dial and a date aperture window at 6 o'clock, and there are two salmon subsidiary dials with black Arabic letters, including a radial day marker at 9 o'clock, and the month at 3 o'clock, and there is a plus-minus power reserve of 45 hours at 12 o'clock, all with charcoal white gold indicator hands. There is a black-framed date aperture window at 6 o'clock, and it's water resistant to 25 meters/70 feet. It has a 45-hour power reserve at full winding, and the 11.2mm thick case, dial, and movement are all signed. This Patek Philippe Advanced Research Annual Calendar 5450P-001 has a mechanical automatic self-winding Patek Philippe caliber 324 S IRM QA LU movement that's rhodium-plated with Cotes de Geneve embellishment and the stamp of the Patek Philippe quality mark. It's constructed with 36 jewels, 355 components, a shock absorber system, a Gyromax monometallic balance, and a 21K gold rotor with zirconium ball bearings. It includes Pulsomax silicon escape wheel, a self-compensating Silinvar Spiromax balance spring, and a straight-line lever escapement. The mechanism oscillates at a frequency of 28,800 vph (4 Hz). The Patek Philippe Advanced Research Annual Calendar 5450P-001 was previewed at the Basel watch show in 2006 and went into production of only 300 pieces beginning in 2007.
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