Recorded in our Monte-Carlo solid 18K gold Patek Philippe register, the Patek Philippe Calatrava Automatic 18K White Gold Reference 5227G-001 unites authentic Geneva proportions (39.0 mm x 9.24 mm) with a certified 18K White Gold Au750 mass of 79.0g. Every detail of the Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, Hand-Finished 18K White Gold 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: Patek Philippe Calatrava Automatic 18K White Gold — Official Reference 5227G-001 (SKU: MC-AU750-5227G-001-W91).
• Precious Metal Alloy: 18K White Gold Au750 with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 79.0g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Patek Philippe Cal. 324 S C - 21K Gold Rotor operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.5 s/d, 297 deg).
• Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 30m / 3 ATM water resistance.

Within the same Patek Philippe horological silo, collectors also compare the Patek Philippe Aquanaut Jumbo 42.2mm 18K White Gold Ref. 5168G (120.6g) and the Patek Philippe Nautilus Off-Catalogue Baguette Ruby Bezel Diamond-Set Bezel 950 Platinum Ref. 5711/112P-001 (244.6g).