Patek Philippe 5050J-019 Retrograde Perpetual Calendar 18K Yellow Gold (24005)
24005 Patek Philippe 5050 Retrograde Perpetual Calendar 5050J, 5050J-019, 5050J019, 18K yellow gold case with an 18K yellow gold deployment buckle, the case is in excellent condition with hallmarks clear and bold, automatic Patek Philippe caliber 315-s-QR aut, movement, day, date, silver dial with applied baton numerals, sapphire crystal, display back, size 36mm thickness 10.6mm, Like New with original certificate dated June 2004, archive papers, additional solid case back, setting pin, and winding box.$54,500
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More about Patek Philippe 5050J-019 Retrograde Perpetual Calendar 18K Yellow Gold
This is an 18K yellow gold Patek Philippe Retrograde Perpetual Calendar, reference 5050J-019. It has an alligator leather strap with an 18K yellow 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, 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.
The 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, reference 5050J-019, 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.