The Patek Philippe reference 5961 is one of the manufacture's most distinctive Annual Calendar Chronograph models, combining two of Patek Philippe's most celebrated complications with a contemporary sporting elegance. Introduced in 2011, the 5961 builds upon the success of the reference 5960 while adding a diamond-set bezel and baguette diamond hour markers, creating a luxurious interpretation of one of the manufacture's most technically accomplished watches. Powered by the automatic in-house Calibre CH 28-520 IRM QA 24H, the movement combines a flyback chronograph with Patek Philippe's patented Annual Calendar, requiring correction only once each year at the end of February. Its well-balanced dial features chronograph indications, power reserve display, day, date and month apertures, and a day/night indicator, delivering exceptional functionality with outstanding legibility. Produced in white gold and rose gold, the 5961 has become one of Patek Philippe's most exclusive modern references, admired for its sophisticated combination of technical innovation, refined craftsmanship and contemporary luxury.