The Audemars Piguet Royal Oak Double Balance Wheel Openworked reference 15416CE.OO.1225CE.02 is a highly exclusive 41mm timepiece limited to 150 pieces worldwide. It features a lightweight, scratch-resistant black ceramic case and integrated bracelet, meticulously finished with the collection’s signature alternating satin-brushed and polished surfaces. The watch is defined by its striking salmon-toned skeletonized dial, which provides a high-contrast backdrop for the blackened rhodium-applied hour markers and luminescent Royal Oak hands. Its octagonal bezel is secured by eight functional screws, and the case maintains a relatively slim profile of approximately 9.9mm while offering 50 meters of water resistance.
At the heart of this timepiece is the self-winding manufacture caliber 3132, a sophisticated movement that incorporates a patented double balance wheel mechanism. By fixing two balance wheels and two hairsprings on the same axis, the system greatly improves chronometric precision and stability through increased mass and reduced friction. The movement is fully openworked, allowing for an unobstructed view of the hand-finished bridges and the mechanical ballet of the dual oscillating organs from both the dial side and through the sapphire crystal caseback. It operates at a frequency of 3 Hz and provides a power reserve of approximately 45 hours.
General reviews for this limited edition highlight its exceptional legibility compared to previous openworked models, credited to the vibrant contrast between the salmon-toned movement and dark rhodium hardware. Collectors and enthusiasts frequently praise the technical prowess of the double balance wheel and the labor-intensive craftsmanship required to finish black ceramic to such high standards. While the 45-hour power reserve is noted as being shorter than the base caliber 3120 due to the energy demands of the dual balance system, the watch is widely regarded as a pinnacle of modern haute horlogerie that successfully merges traditional skeletonization with futuristic materials.