Recorded in our Monte-Carlo solid 18K gold Richard Mille register, the Richard Mille RM 52-05 Pharrell Williams Crystalline Sapphire Tourbillon Reference RM 52-05 unites authentic Geneva proportions (42.7 mm x 50.0 mm x 15.6 mm) with a certified Crystalline Sapphire & Grade 5 Titanium mass of 78.3g. Every detail of the Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, Precision Brushed & Polished CNC Sapphire & 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 52-05 Pharrell Williams Crystalline Sapphire Tourbillon — Official Reference RM 52-05 (SKU: MC-CUST-RM 52-05-W33).
• Precious Metal Alloy: Crystalline Sapphire & Grade 5 Titanium with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 78.3g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Richard Mille Hand-Wound Tourbillon Calibre operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.4 s/d, 306 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 35-01 Rafael Nadal Manual Winding Chronometer Regulated Spec Ref. RM 35-01 (50.1g) and the Richard Mille RM 67-02 Automatic Extra-Flat Sebastien Ogier Carbon TPT Hand-Chamfered Bevel Spec Ref. RM 67-02 (33.3g).