Gravimetric Mass & Chronometric Assay Bulletin
The Rolex Cosmograph Daytona Off-Catalogue Blue Sapphire Bezel & Obsidian Dial 18K White Gold Reference 126599TSA is a hallmarked 18K White Gold Au750 haute horlogerie timepiece measuring 40.0 mm x 11.9 mm with a verified Mettler-Toledo mass of 216.7g, powered by Rolex Manufacture Cal. 4131 - 72h Power Reserve operating at 28,800 vph (+0.7 s/d, 300 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. 126599TSA | SKU: PV-AU750-126599TSA-W20 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 18K White Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 216.7g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Off-Catalog 18K White Gold Bezel Hand-Set with 36 Baguette-Cut Blue Sapphires (TSA — Taille Saphir) and 54 Brilliant-Cut VVS Diamonds on the Case Lugs and Crown Guards • 216.7g 18K White 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 +0.7 s/d, 300 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 • Natural Black & Silver Sheen Volcanic Obsidian Stone Dial with 18K White Gold Applique Baguette Blue Sapphire Hour Markers and Silvery-Gray Chronograph Counters • Integrated 18K White Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Curated within our hallmarked solid 18K gold Rolex collection, the Rolex Cosmograph Daytona Off-Catalogue Blue Sapphire Bezel & Obsidian Dial 18K White Gold Reference 126599TSA exemplifies haute horlogerie metallurgy in 18K White Gold Au750. Milled to exact manufacture geometry (40.0 mm x 11.9 mm), the monobloc middle case, Off-Catalog 18K White Gold Bezel Hand-Set with 36 Baguette-Cut Blue Sapphires (TSA — Taille Saphir) and 54 Brilliant-Cut VVS Diamonds on the Case Lugs and Crown Guards, and Integrated 18K White Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks achieve a verified analytical mass of 216.7g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Defines the Off-Catalog Rolex Daytona Ref. 126599TSA "Blue Sapphire" Silver Sheen Obsidian Dial?
The Rolex Cosmograph Daytona Reference 126599TSA (collector nickname "Blue Sapphire") is an off-catalog solid 18K white gold haute joaillerie chronograph featuring a natural Silver Sheen volcanic obsidian dial, 36 baguette-cut blue sapphires on the bezel (Taille Saphir), and 54 brilliant-cut diamonds across the lugs and crown guards, because each specimen is calibrated to 216.7g with Rolex Manufacture Cal. 4131 - 72h Power Reserve.
5 Core Horological & Metallurgical Specifications:
- Entity & Reference: Rolex Cosmograph Daytona Off-Catalogue Blue Sapphire Bezel & Obsidian Dial 18K White Gold — Official Reference 126599TSA (SKU: PV-AU750-126599TSA-W20).
- Precious Metal Assay: 18K White Gold Au750 verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 216.7g 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 (+0.7 s/d, 300 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 Geneva Atelier Spec Ref. 126518LN (160.4g) and the Rolex Cosmograph Daytona Gibeon Meteorite Dial 18K White Gold Hand-Finished Buff Dial 5-Axis CNC Case Ref. 116509 (216.1g).
- 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. 126599TSA?
At 18K Solid Gold 18K Solid Gold Salon, this Rolex Cosmograph Daytona Off-Catalogue Blue Sapphire Bezel & Obsidian Dial 18K White Gold Ref. 126599TSA weighs 216.7g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 18K White Gold reference.
How is the 18K White 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 126599TSA and what is its power reserve?
Reference 126599TSA 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 +0.7 s/d, 300 deg.
What does the TSA suffix and Silver Sheen Obsidian dial signify on Rolex Daytona Ref. 126599TSA?
On Rolex Cosmograph Daytona Reference 126599TSA (known to collectors as the "Blue Sapphire" Off-Catalog Daytona), the TSA designation stands for Taille Saphir: 36 graduated baguette-cut blue sapphires bezel-set into solid 18K white gold, paired with 54 brilliant-cut diamonds on the lugs and crown guards and a natural volcanic Silver Sheen Obsidian stone dial weighing 216.7g.
Rolex Cosmograph Daytona Off-Catalogue Blue Sapphire Bezel & Obsidian Dial 18K White Gold Reference 126599TSA — Hallmarked Edition
Hallmarked Au750 & Pt950 Salon Edition • 216.7g Verified Mass • Rolex Manufacture Cal. 4131 - 72h Power Reserve