Recorded in our Monte-Carlo solid 18K gold Richard Mille register, the Richard Mille RM 055 Bubba Watson Manual Winding Sapphire Caseback Spec Reference RM 055 unites authentic Geneva proportions (42.7 mm x 49.9 mm x 13.05 mm) with a certified ATZ White Ceramic & Grade 5 Titanium mass of 66.3g. Every detail of the Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, Precision Brushed & Polished ATZ Ceramic & Titanium 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: Richard Mille RM 055 Bubba Watson Manual Winding Sapphire Caseback Spec — Official Reference RM 055 (SKU: MC-CUST-RM 055-W511).
• Precious Metal Alloy: ATZ White Ceramic & Grade 5 Titanium with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 66.3g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Richard Mille Cal. RMUL2 Grade 5 Titanium Skeleton operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.5 s/d, 303 deg).
• Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 50m / 5 ATM - Dual Nitrile O-Ring Seals water resistance.

Within the same Richard Mille horological silo, collectors also compare the Richard Mille RM 055 Bubba Watson Manual Winding 5-Axis CNC Case Ref. RM 055 (66.2g) and the Richard Mille RM 35-02 Rafael Nadal Automatic Free-Sprung Calibre Ref. RM 35-02 (50.1g).