Patek Philippe 5905/1A Chronograph Annual Calendar Green Dial SS

More about 5905/1A Chronograph Annual Calendar Green Dial SS

This is a stainless steel Patek Philippe Annual Calendar Chronograph 5905/1A-001. It includes a stainless-steel link bracelet with a double deployment buckle and scratch resistant sapphire crystals. There is an exhibition sapphire display case back, rectangular fly back chronograph pushbuttons, and three correctors on the left side of the case for adjusting the calendar. The 42mm diameter solid three-body case, downturned lugs, and angled bezel are polished. The dial is sunburst olive green with applied white gold faceted baton hour markers and luminous dot indices. A minute/one-fifth second track surrounds the perimeter. It has white gold alpha hands with luminous inserts, and a center sweep chronograph hand. There are three trapezoidal aperture windows for the annual calendar, including the day at 10 'clock, the date at 12 o'clock with a day/night indicator, and the month at 2 o'clock. There is a circular subsidiary dial at 6 o'clock for the sweep constant running seconds. It's water resistant to 30 meters/100 feet, and it has a 56-hour power reserve at full wind. The 14.13mm thick case, dial, and movement are all signed. The mechanical automatic self-winding Pate Philippe caliber CH 28-520 QA 24H movement is rhodium-plated with circular Cotes de Geneve embellishment. It's stamped with the Patek Philippe seal, and it's constructed with 37 jewels, 402 components, and a shock absorber device. It includes a straight-line lever escapement, a Gyromax balance that's adjusted to heat, cold, isochronism and 5 positions, and a Spiromax balance spring. It has a 21K gold central rotor with oil-free ball bearing and zirconium balls. The mechanism oscillates at a frequency of 28,800 vph (4Hz). Patek Philippe produced its first self-winding chronograph in 2006. This Patek Philippe Annual Calendar Chronograph, reference 5905/1A-001, made its debut in 2022.

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