Patek Philippe 5050G-001 Retrograde Perpetual Calendar 18K White Gold UNPOLISHED (28007)

28007 Patek Philippe 5050 Retrograde Perpetual Calendar 5050G, 5050G-001, 5050G001, 18K white gold case with an 18K white gold deployant buckle, the case is in excellent unpolished condition with hallmarks clear and bold, automatic Patek Philippe caliber 315-s-QR movement, day, date, silver dial with applied baton numerals, sapphire crystal, display back, size 36mm thickness 10.6mm, Like New with box, original additional solid case back, setting pin, winding box, and original certificate dated August 1999.

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More about Patek Philippe 5050G-001 Retrograde Perpetual Calendar 18K White Gold UNPOLISHED

This is an 18K white gold Patek Philippe Retrograde Perpetual Calendar 5050G-001. It has an alligator leather strap with an 18K white gold double deployant Calatrava buckle, and a scratch resistant sapphire crystal. There is a screw-down exhibition sapphire display case back with the Calatrava emblem visible on the gold rotor. The 36mm diameter solid three-body case, curved downturned lugs, and cupped bezel are polished, and all hallmarks are clear and bold, including those underneath the lugs. The dial is silver with applied faceted gold baton hour markers, white gold feuille hands, and a blued centered sweep seconds hand. There is a retrograde date arch from 8 to 4 o'clock, with a blued indicator hand. There is a gold dot minute/second track around the perimeter. A day aperture window is at 9 o'clock, a matching window for the month is at 9 o'clock, and a leap year indicator is at 12 o'clock. The moon phase subsidiary dial is at the 6 o'clock position, and it has a 46-hour power reserve at full wind. It's water resistant to 25 meters/80 feet, and the 10.6mm thick case, dial, and movement are all signed.

This Patek Philippe Retrograde Perpetual Calendar 5050G-001 has a mechanical automatic self-winding Patek Philippe caliber 315/136 movement is rhodium-plated, with fausses cotes embellishment. It has the Geneva seal of quality as well as the Patek Philippe stamps. It's constructed with 31 jewels, a Kif shock protection device, and a straight-line lever escapement. It includes a Gyromax balance that's adjusted to heat, cold, isochronism and 5 positions, a 21K gold winding rotor, and a self-compensating free-sprung flat balance spring. The mechanism oscillates at a frequency of 21,600 vph (3 Hz).

The Patek Philippe Retrograde Perpetual Calendar 5050G-001 was introduced in the mid 1990s, inspired by the 1930's Calatrava. This is the first Patek Philippe perpetual calendar with a retrograde fly back date produced in series. It was only in production for about 4 years.