Patek Philippe reinterprets the Reference 5204R split-seconds chronograph and perpetual calendar in a contemporary spirit by combining a rose gold case with a matching slate gray dial and strap. This rare and refined nuance contributes to renewing the style of this much sought-after Grand Complication. The transparent sapphire caseback offers a magnificent immersion into the heart of caliber CHR 29-535 PS Q, with its traditional architecture (manual winding, two column wheels, horizontal clutch) combined with seven patented innovations and highly refined manual finishing.