Recorded in our Monte-Carlo solid 18K gold Rolex register, the Rolex GMT-Master II Guinness / Zombie Grey & Black Cerachrom 18K Everose Gold Reference 126715CHNR unites authentic Geneva proportions (40.0 mm x 11.9 mm) with a certified 18K Rose Gold Au750 mass of 225.4g. Every detail of the Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, Bidirectional 24-Hour Brown & Black Root Beer Cerachrom Ceramic Bezel, and hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.

5 Core Horological & Metallurgical Specifications:

• Registered Entity & Ref: Rolex GMT-Master II Guinness / Zombie Grey & Black Cerachrom 18K Everose Gold — Official Reference 126715CHNR (SKU: MC-AU750-126715CHNR-W606).
• Precious Metal Alloy: 18K Rose Gold Au750 with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 225.4g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Rolex Manufacture Cal. 3285 - 70h Power Reserve operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.5 s/d, 299 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 Barbie Pink Opal & Ruby 18K Yellow Gold Deep Crystal Optics Ref. 126538TBR (160.1g) and the Rolex Day-Date 36 Natural Ferrite Stone Dial 18K Yellow Gold Deep Crystal Optics Ref. 18238 (141.8g).