Audemars Piguet Royal Oak Perpetual Calendar Openworked

About this reference

The Audemars Piguet Royal Oak Perpetual Calendar Openworked reference 26585CE.OO.1225CE.01 was introduced in 2019 and remains in the current catalog as a boutique-exclusive model. Collectors prioritize this reference for its full black ceramic construction, including the case, bezel, and integrated bracelet, which requires high labor intensity to finish. It houses the self-winding caliber 5135, a skeletonized movement visible through a sapphire dial that features smoked external zones and pink gold applied hour markers. The secondary market price for this reference typically ranges between $375,000 and $450,000, though it reached significantly higher peaks in 2022. A notable production detail is the use of a titanium folding clasp for durability against the ceramic links. In 2021, a unique "Cactus Jack" collaboration variant was released, but the standard 26585CE remains the foundational high-complication ceramic model for the brand.