This is a Rolex Yacht-Master 42, reference 226659.
Key Details
• Model Family: Rolex Yacht-Master
• Reference: 226659 (42mm)
• Material: 18ct white gold case, paired with a black Oysterflex rubber bracelet
• Bezel: Black Cerachrom ceramic rotating dive bezel with a 60-minute scale
• Dial: Black dial with luminous hour markers, date window at 3 o'clock
• Movement: Manufacture Calibre 3235 automatic movement, with a 70-hour power reserve
• Water Resistance: 100m / 330ft