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The Patek Philippe Ref. 5961R-010 debuted in 2011 and combines a self-winding flyback chronograph with the manufacture’s patented Annual Calendar mechanism. The watch is housed in a 40.5 mm rose gold case with a fully polished finish and a sapphire crystal case back. The bezel is set with 36 baguette-cut diamonds. The ebony black opaline dial features calendar apertures for the day, date, and month arranged along an arc, requiring only one manual correction per year at the end of February. Chronograph indications are grouped in a large monocounter displaying both 60-minute and 12-hour elapsed times, accompanied by a central chronograph seconds hand. Applied rose gold hour markers are set with baguette-cut diamonds, complemented by rose gold leaf-shaped hands with luminescent coating. A power reserve indicator is integrated into the dial layout. Powering the watch is the self-winding Caliber CH 28-520 IRM QA 24H. The movement measures 33 mm in diameter and 7.68 mm in thickness and consists of 456 components and 40 jewels. It operates at a frequency of 28,800 semi-oscillations per hour and provides a power reserve of approximately 45 to 55 hours. Winding is achieved via a central 21K gold rotor, while regulation is ensured by a Gyromax balance paired with a Spiromax balance spring. The case is water-resistant to 30 meters and secured by a clasp set with additional baguette-cut diamonds. The movement is finished and certified according to the Patek Philippe Seal.