The Audemars Piguet Royal Oak Jumbo Extra-Thin Openworked reference 16204OR.OO.1240OR.03 is a 39mm luxury sports watch crafted from 18k pink gold. It features an ultra-thin case profile of 8.1mm and the collection’s iconic octagonal bezel secured by eight hexagonal screws. The timepiece is defined by its slate grey openworked dial, which provides a view of the intricate mechanical architecture, complemented by pink gold applied hour markers and Royal Oak hands with luminescent coating. It is powered by the self-winding Calibre 7124 movement, which offers a power reserve of approximately 57 hours and a frequency of 4Hz.
The watch focuses on essential horological functions, providing the hours and minutes. Its openworked design showcases the art of skeletonization, revealing the movement’s bridges and gears through both the dial side and the sapphire crystal caseback. The construction utilizes a screw-down crown to ensure water resistance up to 50 meters. The integrated 18k pink gold bracelet is finished with a folding AP clasp, maintaining the seamless aesthetic and high-standard finishing synonymous with the Royal Oak line.
General reviews of the 16204OR emphasize its status as a masterclass in openworking, specifically noting the high level of manual finishing with over 300 hand-polished angles. Collectors often praise the balanced 39mm proportions that stay true to the original 1972 design while offering a more contemporary, geometric movement architecture compared to previous skeletonized models. While the openwork design is lauded for its artistic depth and complexity, some reviewers note that legibility can be a challenge due to the low contrast between the hands and the skeletonized movement.