BLK's latest Rolex Yacht-Master series in 40mm/42mm features a calendar that supports both forward and backward adjustments! It is equipped with the exclusive custom 3235 integrated movement, ensuring stability and reliability in performance. Quality assurance is guaranteed.1. Case: The size and thickness are consistent with the original, making market versions easily identifiable as fake.2. Dial: Features top-grade Swiss ice blue luminescence, with a delicate texture and color matching; exceptionally strong moonlight-king of the night!.3. Glass: Sapphire glass with a 2.5x magnifying effect, offering crystal clarity and sharper font visibility.4. Strap: Made of fluororubber, each strap fits perfectly with the lugs, providing the highest comfort for your wrist. Orders for the welfare strap version will receive a complimentary natural rubber strap, a guaranteed premium product, with every exquisite detail developed with BLK's craftsmanship and sincerity.5. First-class workmanship-trust in BLK's unique serial number and distinctive design. Quality assurance is provided, with high-quality, high-end products!