AP Audemars Piguet CODE 11.59 Series 26394 .Men s Watch: A Perfect Experience of Individuality .1. Case diameter: 41MM; the surface glass is made of sapphire crystal.2. Equipped with a custom made Caliber 5134 movement.3. All functions, including date, day, month, and moon phase, are fully operational and genuine; the strap is available in imported Italian calfskin or canvas leather.4. The case is made of 316L stainless steel, with the entire casing processed with high precision CNC technology, matching the density of the original.5. The dial perfectly presents the original color.6. The case set consists of three pieces: the bezel, case, and back cover, with a flawless representation of the brushed finish, embodying the fusion of quality and beauty.