AP Royal Oak 26574ST Series Men's Watch: An Experience of Perfection and Individuality .1. Diameter: 41MM .2. Equipped with a custom Cal. 5134 movement, perfectly replicating all functionalities.3. True functional features including calendar, day, month, and moon phase, all fully operational. Available with a leather strap option.4. The case is made of 316L stainless steel, with the entire body processed with high precision CNC, matching the density of the original.5. The dial is presented in its original color perfectly.6. The case consists of three parts: bezel, case, and case back, showcasing the brushed finish at perfect angles, merging quality with beauty.