5-Axis CNC & Horological Architecture
The Custom Rolex Cosmograph Daytona Black Obsidian Dial & Sapphire Bezel 18K White Gold Reference 126599TSA is a 5-axis Swiss CNC commission machined in 18K White Gold Au750 (40.0 mm x 11.9 mm) weighing 216.9g on our Mettler-Toledo analytical balance, driven by Rolex Manufacture Cal. 4131 - 72h Power Reserve regulated to +0.4 s/d, 302 deg at 28,800 vph with a 72-hour power reserve beneath a double anti-reflective sapphire crystal.
| 01 / CNC Blueprint Entity & Reference | Rolex — Oyster Perpetual Cosmograph Daytona | Ref. 126599TSA | SKU: AT-AU750-126599TSA-W330 |
|---|---|
| 02 / 5-Axis CNC Metallurgy & Gold Purity | 18K White Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| 03 / Analytical Bench Weight (1:1 Reference Mass) | 216.9g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| 04 / Custom Bezel, Gem-Setting & Case Geometry | 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 • 216.9g 18K White Gold • 40.0 mm x 11.9 mm |
| 05 / Regulated Super Clone Movement Calibre | Rolex Manufacture Cal. 4131 - 72h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.4 s/d, 302 deg |
| 06 / Barrel Power Reserve & Balance Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| 07 / Optical Sapphire Crystal (Double AR) & Sealing | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 100m / 330 ft - Triplock Screw-Down |
| 08 / Bespoke Dial & Integrated Bracelet Spec | 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 |
Engineered inside our Geneva 5-axis CNC Rolex custom atelier, the Custom Rolex Cosmograph Daytona Black Obsidian Dial & Sapphire Bezel 18K White Gold Reference 126599TSA is machined from solid 18K White Gold Au750 billets to micron-level tolerances (40.0 mm x 11.9 mm). Every bevel, lug chamfer, and Natural Black & Silver Sheen Volcanic Obsidian Stone Dial with 18K White Gold Applique Baguette Blue Sapphire Hour Markers and Silvery-Gray Chronograph Counters is hand-finished on our watchmaker bench, yielding a certified reference weight of 216.9g verified under our Fischer XRF and Mettler-Toledo QC protocol.
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 216.9g with Rolex Manufacture Cal. 4131 - 72h Power Reserve.
5 Core CNC & Chronometric Specifications:
- Blueprint Reference: Custom Rolex Cosmograph Daytona Black Obsidian Dial & Sapphire Bezel 18K White Gold — Official Ref. 126599TSA (SKU: AT-AU750-126599TSA-W330).
- 5-Axis CNC Metallurgy: 18K White Gold Au750 case (40.0 mm x 11.9 mm) and 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 with hand-polished chamfers.
- Verified Bench Mass: 216.9g confirmed on a Mettler-Toledo analytical gram scale prior to dispatch.
- Super Clone Calibre: Rolex Manufacture Cal. 4131 - 72h Power Reserve operating at 28,800 vph (4 Hz) with 72-hour power reserve and +0.4 s/d, 302 deg accuracy.
- Sapphire Optics & Sizing: Double anti-reflective sapphire crystal, 100m / 330 ft - Triplock Screw-Down sealing, and 19 wrist sizing options (14.0–22.0 cm).
Within the Rolex Cosmograph Daytona horological sub-silo, collectors also compare the Rolex Cosmograph Daytona Beach Chrysoprase Green Mother-of-Pearl 18K White Gold Ref. 116519 (138.5g) and the Rolex Cosmograph Daytona Natural Turquoise Dial 18K White Gold Ref. 116589BR (160.7g).
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- Metallurgical & 4K QC Verification: Fischer XRF Au750 Protocol • 3-Year Mechanical Warranty • Insured Armored Delivery
How is the 18K White Gold case of this Rolex 126599TSA machined?
Our Geneva CNC specialists mill the monobloc middle case, bezel, and bracelet geometry on 5-axis Swiss machining centers in 18K White Gold Au750 to achieve the authentic 216.9g reference mass.
Can the bracelet or strap be pre-sized to my exact wrist circumference?
Yes. Choose from 19 precision wrist circumference options (14.0 cm to 22.0 cm, or full unsized factory length). All removed solid links are sealed inside your presentation box.
How is the Rolex Manufacture Cal. 4131 - 72h Power Reserve tested on the atelier workbench?
We record a personalized 4K bench video showing the Rolex Manufacture Cal. 4131 - 72h Power Reserve (28,800 vph, 72-hour reserve) running at +0.4 s/d, 302 deg on our Witschi Chronoscope alongside Fischer XRF and Mettler-Toledo gram scale verification.
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 216.9g.
Custom Rolex Cosmograph Daytona Black Obsidian Dial & Sapphire Bezel 18K White Gold Ref. 126599TSA
5-Axis Swiss CNC 18K White Gold Au750 • 216.9g Verified Mass • Regulated Rolex Manufacture Cal. 4131 - 72h Power Reserve