5-Axis CNC & Horological Architecture
The Custom Rolex Cosmograph Daytona Ghost Sunray Grey & Black Subdials on Oysterflex 18K White Gold Reference 126519LN is a 5-axis Swiss CNC commission machined in 18K White Gold Au750 (40.0 mm x 11.9 mm) weighing 160.5g on our Mettler-Toledo analytical balance, driven by Rolex Manufacture Cal. 4131 - 72h Power Reserve regulated to +0.6 s/d, 297 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. 126519LN | SKU: AT-AU750-126519LN-W712 |
|---|---|
| 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) | 160.5g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| 04 / Custom Bezel, Gem-Setting & Case Geometry | Monobloc Black Cerachrom Ceramic Tachymeter Bezel with Platinum PVD Graduations • 160.5g 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 +0.6 s/d, 297 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 • Sunray Steel-Grey Ghost Dial with Matte Black Chronograph Subdials & 18K White Gold Markers • Oysterflex High-Performance Elastomer Strap with Solid 18K White Gold Oysterlock Folding Safety Clasp |
Engineered inside our Geneva 5-axis CNC Rolex custom atelier, the Custom Rolex Cosmograph Daytona Ghost Sunray Grey & Black Subdials on Oysterflex 18K White Gold Reference 126519LN 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 Sunray Steel-Grey Ghost Dial with Matte Black Chronograph Subdials & 18K White Gold Markers is hand-finished on our watchmaker bench, yielding a certified reference weight of 160.5g verified under our Fischer XRF and Mettler-Toledo QC protocol.
What Are the Horological & Metallurgical Benchmarks of Rolex Cosmograph Daytona Ref. 126519LN?
The Rolex Cosmograph Daytona Reference 126519LN is a precision-engineered luxury timepiece crafted in 18K White Gold Au750 (40.0 mm x 11.9 mm) with Sunray Steel-Grey Ghost Dial with Matte Black Chronograph Subdials & 18K White Gold Markers, Monobloc Black Cerachrom Ceramic Tachymeter Bezel with Platinum PVD Graduations, and a verified Mettler-Toledo mass of 160.5g, because the Rolex Manufacture Cal. 4131 - 72h Power Reserve movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core CNC & Chronometric Specifications:
- Blueprint Reference: Custom Rolex Cosmograph Daytona Ghost Sunray Grey & Black Subdials on Oysterflex 18K White Gold — Official Ref. 126519LN (SKU: AT-AU750-126519LN-W712).
- 5-Axis CNC Metallurgy: 18K White Gold Au750 case (40.0 mm x 11.9 mm) and Monobloc Black Cerachrom Ceramic Tachymeter Bezel with Platinum PVD Graduations with hand-polished chamfers.
- Verified Bench Mass: 160.5g 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 +0.6 s/d, 297 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 Rainbow Sapphire Bezel 18K Everose Gold Custom SW Dial Ref. 116595RBOW (216.5g) and the Rolex Cosmograph Daytona Gibeon Meteorite Dial & Black Cerachrom Bezel on Oysterflex 18K Yellow Gold Ref. 126518LN (160.4g).
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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 126519LN 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 160.5g 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 +0.6 s/d, 297 deg on our Witschi Chronoscope alongside Fischer XRF and Mettler-Toledo gram scale verification.
What dial and bezel specifications distinguish Rolex Cosmograph Daytona Ref. 126519LN?
Reference 126519LN combines Sunray Steel-Grey Ghost Dial with Matte Black Chronograph Subdials & 18K White Gold Markers and Monobloc Black Cerachrom Ceramic Tachymeter Bezel with Platinum PVD Graduations within a 40.0 mm x 11.9 mm 18K White Gold Au750 case weighing 160.5g, verified via Fischer XRF spectroscopy and powered by Rolex Manufacture Cal. 4131 - 72h Power Reserve.
Custom Rolex Cosmograph Daytona Ghost Sunray Grey & Black Subdials on Oysterflex 18K White Gold Ref. 126519LN
5-Axis Swiss CNC 18K White Gold Au750 • 160.5g Verified Mass • Regulated Rolex Manufacture Cal. 4131 - 72h Power Reserve