Recorded in our Monte-Carlo solid 18K gold Rolex register, the Rolex Yacht-Master 42 Diamond-Set Bezel 18K White Gold Reference 226659 unites authentic Geneva proportions (42.0 mm x 11.7 mm) with a certified 18K White Gold Au750 mass of 170.2g. Every detail of the Diamond-Set Bezel with Solid 18K Gold Applied Hour Markers & Hands, Brilliant-Cut VVS1 Diamond-Set Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.

5 Core Horological & Metallurgical Specifications:

• Registered Entity & Ref: Rolex Yacht-Master 42 Diamond-Set Bezel 18K White Gold — Official Reference 226659 (SKU: MC-AU750-226659-W542).
• Precious Metal Alloy: 18K White Gold Au750 with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 170.2g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Rolex Manufacture Cal. 3235 - 70h Power Reserve operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.6 s/d, 298 deg).
• Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 100m / 330 ft - Triplock Screw-Down water resistance.

Within the same Rolex horological silo, collectors also compare the Rolex Cosmograph Daytona Beach Pink Mother-of-Pearl Strap Edition 18K White Gold Ref. 116519 (138.4g) and the Rolex Cosmograph Daytona 18K Yellow Gold Chronometer Regulated Spec Ref. 126518LN (160.9g).