Gravimetric Mass & Chronometric Assay Bulletin
The Rolex Cosmograph Daytona 18K Everose Gold Sapphire Caseback Spec Reference 126505 is a hallmarked 18K Rose Gold Au750 haute horlogerie timepiece measuring 40.0 mm x 11.9 mm with a verified Mettler-Toledo mass of 216.1g, powered by Rolex Manufacture Cal. 4131 - 72h Power Reserve operating at 28,800 vph (+0.8 s/d, 304 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 100m / 330 ft - Triplock Screw-Down water resistance.
| I. Official Maison Entity & Reference | Rolex — Oyster Perpetual Cosmograph Daytona | Ref. 126505 | SKU: PV-AU750-126505-W449 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 18K Rose Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 216.1g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Hand-Finished 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 216.1g 18K Everose Gold • 40.0 mm x 11.9 mm |
| V. Mechanical Manufacture Calibre | Rolex Manufacture Cal. 4131 - 72h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.8 s/d, 304 deg |
| VI. Power Reserve & Oscillation Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| VII. Double AR Sapphire Crystal & Hermeticity | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 100m / 330 ft - Triplock Screw-Down |
| VIII. Dial Finishing, Bracelet & Hallmarked Clasp | 40.0 mm x 11.9 mm • Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K Everose Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Curated within our hallmarked solid 18K gold Rolex collection, the Rolex Cosmograph Daytona 18K Everose Gold Sapphire Caseback Spec Reference 126505 exemplifies haute horlogerie metallurgy in 18K Rose Gold Au750. Milled to exact manufacture geometry (40.0 mm x 11.9 mm), the monobloc middle case, Hand-Finished 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and Integrated 18K Everose Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks achieve a verified analytical mass of 216.1g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Are the Horological & Metallurgical Benchmarks of Rolex Cosmograph Daytona Ref. 126505?
The Rolex Cosmograph Daytona Reference 126505 is a precision-engineered luxury timepiece crafted in 18K Rose Gold Au750 (40.0 mm x 11.9 mm) with Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, Hand-Finished 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and a verified Mettler-Toledo mass of 216.1g, because its Rolex Manufacture Cal. 4131 - 72h Power Reserve movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core Horological & Metallurgical Specifications:
- Entity & Reference: Rolex Cosmograph Daytona 18K Everose Gold Sapphire Caseback Spec — Official Reference 126505 (SKU: PV-AU750-126505-W449).
- Precious Metal Assay: 18K Rose Gold Au750 verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 216.1g total mass weighed on a calibrated Mettler-Toledo laboratory scale.
- Calibre & Oscillating System: Rolex Manufacture Cal. 4131 - 72h Power Reserve beating at 28,800 vph (4 Hz) with a 72-hour power reserve (+0.8 s/d, 304 deg).
- Crystal & Hermeticity: Scratch-resistant sapphire crystal with double anti-reflective coating and 100m / 330 ft - Triplock Screw-Down rating.
Within the Rolex Cosmograph Daytona horological sub-silo, collectors also compare the Rolex Cosmograph Daytona 18K Yellow Gold Deep Crystal Optics Ref. 116518LN (160.7g) and the Rolex Cosmograph Daytona Le Mans 100th Anniversary 18K Yellow Gold Ref. 126528LN (216.9g).
- Parent Brand & Cosmograph Daytona Silo Hub: Browse All 289 Certified Rolex Solid 18K Gold & Pt950 Watches
- Technical Research Monograph: Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide (All 5 Journal Monographs)
- Homepage Master Register: Return to 18K SOLID GOLD Homepage (Complete 774-Watch Solid 18K Gold & Pt950 Register)
- All-Brands Catalogue: Explore Complete 12-Maison Horological Catalogue (/shop/)
- Metallurgical & Escrow Verification: Fischer XRF Au750 Protocol • 3-Year Mechanical Warranty • Insured Armored Delivery
What is the verified authentic gram weight of this Rolex Ref. 126505?
At 18K Solid Gold 18K Solid Gold Salon, this Rolex Cosmograph Daytona 18K Everose Gold Sapphire Caseback Spec Ref. 126505 weighs 216.1g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 18K Everose Gold reference.
How is the 18K Rose Gold Au750 purity verified prior to dispatch?
Every timepiece undergoes non-destructive Fischer X-Ray Fluorescence (XRF) spectroscopy confirming elemental bullion composition alongside a personalized 4K scale and hallmark inspection video.
Which movement powers Reference 126505 and what is its power reserve?
Reference 126505 is equipped with the Rolex Manufacture Cal. 4131 - 72h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated in our Paris and Geneva workshop to +0.8 s/d, 304 deg.
What dial and bezel specifications distinguish Rolex Cosmograph Daytona Ref. 126505?
Reference 126505 combines Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands and Hand-Finished 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal within a 40.0 mm x 11.9 mm 18K Rose Gold Au750 case weighing 216.1g, verified via Fischer XRF spectroscopy and powered by Rolex Manufacture Cal. 4131 - 72h Power Reserve.
Rolex Cosmograph Daytona 18K Everose Gold Sapphire Caseback Spec Reference 126505 — Hallmarked Edition
Hallmarked Au750 & Pt950 Salon Edition • 216.1g Verified Mass • Rolex Manufacture Cal. 4131 - 72h Power Reserve