Audemars Piguet Royal Oak Perpetual Calendar Openworked Black Ceramic

The skeletonized dial offers a mesmerizing view into the perpetual calendar movement, revealing its intricate gears, levers, and bridges. It transforms the watch into not just a timekeeper, but a work of mechanical art, fully visible through the front and transparent caseback.

Inside beats the Caliber 5135, a skeletonized evolution of the Caliber 5134. While both track the same perpetual calendar functions, the 5135 is openworked and hand-finished, showcasing AP’s savoir-faire in haute horlogerie with an architectural, technical aesthetic.

Ceramic is not only incredibly hard and scratch-resistant, but also extremely difficult to polish and finish to AP’s standards. The deep black ceramic case and bracelet elevate this openworked QP with a sleek, futuristic look while offering exceptional durability and comfort.

The 26585CE is among the most exclusive Royal Oak QP variants, with limited production and high demand. The combination of skeletonization and black ceramic makes it an ultra-collectible, boutique-only piece, rarely seen even in seasoned collections.

While the ceramic build makes it resilient enough for frequent wear, most collectors treat this reference as a statement piece or grail watch. It’s perfect for those who appreciate technical complexity, rarity, and standout design in a luxury timepiece.