The Audemars Piguet Royal Oak Perpetual Calendar 41mm 26574OR.OO.1220OR.02 is a masterpiece that marries the Royal Oak's iconic design with the complexity of a perpetual calendar. Its 41mm 18-carat pink gold case exudes elegance, featuring the signature octagonal bezel secured by hexagonal screws. The silver dial showcases the "Grande Tapisserie" pattern and legible sub-dials for day, date, month, and moon phase. The perpetual calendar accurately tracks these elements until 2100, while the moon phase and leap year indicators enhance functionality. The self-winding movement ensures precise timekeeping, and the transparent case back reveals the meticulous craftsmanship. Paired with a matching pink gold bracelet, this watch embodies luxury and refinement, appealing to connoisseurs of both style and function.