BLK's latest Rolex Yacht-Master series in 40mm/42mm features a calendar that supports both forward and reverse adjustments! It is equipped with an exclusive custom-made 3235 integrated movement, ensuring stable and reliable performance. Quality assurance is guaranteed.1. Case: The size and thickness are consistent with the original model, making it easy to identify any market counterfeit.2. Dial: Premium Swiss ice blue luminescence, with a delicate texture and accurate color matching; it shines brightly like the moon, the king of the night! .3. Glass: Sapphire glass with a 2.5x magnifying effect, offering clarity and transparency; the font is clearer.4. Strap: Fluoroelastomer strap, perfectly fitting the lugs for maximum comfort on the wrist. Order the special rubber strap version to receive a complimentary natural rubber strap, a guaranteed fine product. Every exquisite detail is crafted with BLK's dedication; exceptional workmanship, identifiable by BLK's unique serial number and distinctive design. Quality assurance, high quality, and premium products!