Audemars Piguet Royal Oak Concept, Royal Oak Concept Series, high-end watchmaking and jewelry craftsmanship coexist harmoniously, inlaid with brilliant-cut diamonds or step-cut diamonds, with a unique design of complex mechanisms, creating a floating visual effect, and the hidden inlay technology makes the step-cut diamond starry sky watch more dazzling. Diameter 42mm, fully automatic. Luxurious, beautiful, and sparkling.