AP Royal Oak 26574ST Series Men s Watch A Perfect Experience of Individuality.1. Case Diameter: 41MM .2. Equipped with a custom Cal. 5134 movement, perfectly restoring functionality .3. Features all genuine functions such as date, day, month, and moon phase, all fully operational and available for customization .4. The case is made of 316L stainless steel, with the entire shell processed with high precision CNC, matching the density of the original .5. The dial presents the original color perfectly .6. The case set consists of three pieces: the case, the bezel, and the back cover, showcasing a perfect brushed finish and a blend of quality and beauty