Patek Philippe 5235G Annual Calendar Regulator 18K White Gold SEALED (28575)

28575 Patek Philippe 5235G Annual Calendar Regulator, 5235G-001, 5235G001, 18K white gold on an alligator strap with a white gold tang buckle, automatic Patek Philippe caliber 31-260 REG, 48-hour power reserve, annual calendar with day, date and month apertures, two tone silver dial with a vertical satin finish, sapphire crystal, display back, water resistant, size: 40.5, thickness: 11mm, Unworn and still sealed with box and original papers dated Aug 2017.

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More about Patek Philippe 5235G Annual Calendar Regulator 18K White Gold SEALED

This is an 18K white gold Patek Philippe Annual Calendar Regulator 5235G. It has a blue alligator leather strap with a matching white gold tang buckle, and a scratch resistant, anti-reflective sapphire crystal. The 40.5mm diameter solid two-body case, angled bezel and lugs are polished. It has a transparent sapphire display case back. The dial is two-tone silver with a vertical satin-brushed finish, an outer minute track and two subsidiary dials with blue transfer-printed Arabic numerals, and a blued steel baton sweep minute hand. There is a sub dial for the 12-hour register at the 12 o'clock position, and a seconds register at 6 o'clock that includes a window for the date; the regulator dial separates the different time functions. There is a trapezoidal aperture window for the day of the week at 10 o'clock, and another for the month at 2. It's water resistant to 30 meters/100 feet, and there is a 48-hour power reserve at full wind. The 11mm thick case, dial, and movement are all signed.

This Patek Philippe Annual Calendar Regulator 5235G has a mechanical automatic self-winding Patek Philippe ultra-thin caliber 31-260 REG QA movement that's rhodium-plated, with fausses cotes embellishment. It's stamped with the Patek Philippe Quality seal, and it's constructed with 31 jewels, 313 components, and a Pulsomax straight-line lever escapement. It includes a free-sprung Gyromax balance, a shock absorber mechanism, a Spiromax self-compensating flat balance spring, and an 18K gold rotor. The oscillator components are made from Silinvar, which is a high-tech material derived from silicon; they are completely anti-magnetic, highly shock-resistant, anti-corrosive, and they require no lubrication. The mechanism oscillates at 23,040 vph (3.2 Hz)

This Patek Philippe Annual Calendar Regulator 5235G was introduced at the Basel world show in 2012. Regulator timepieces were traditionally used for accurate timekeeping at workshops and observatories. The hour display on this watch was moved off-center so that watchmakers had an unobstructed view of the seconds hand for the most accurate adjustments so that no hand occluded the seconds register during the working day.