5-Axis CNC & Horological Architecture
The Custom Rolex Cosmograph Daytona John Mayer II Emerald & Gold Subdials 18K Yellow Gold Reference 126508 is a 5-axis Swiss CNC commission machined in 18K Yellow Gold Au750 (40.0 mm x 11.9 mm) weighing 216.4g on our Mettler-Toledo analytical balance, driven by Rolex Manufacture Cal. 4131 - 72h Power Reserve regulated to +0.5 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. 126508 | SKU: AT-AU750-126508-W721 |
|---|---|
| 02 / 5-Axis CNC Metallurgy & Gold Purity | 18K Yellow Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| 03 / Analytical Bench Weight (1:1 Reference Mass) | 216.4g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| 04 / Custom Bezel, Gem-Setting & Case Geometry | Hand-Finished 18K Yellow Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 216.4g 18K Yellow 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 +0.5 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 • Vibrant Emerald & Gold Subdials John Mayer II Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K Yellow 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 John Mayer II Emerald & Gold Subdials 18K Yellow Gold Reference 126508 is machined from solid 18K Yellow Gold Au750 billets to micron-level tolerances (40.0 mm x 11.9 mm). Every bevel, lug chamfer, and Vibrant Emerald & Gold Subdials John Mayer II Dial with Solid 18K Gold Applied Hour Markers & Hands is hand-finished on our watchmaker bench, yielding a certified reference weight of 216.4g verified under our Fischer XRF and Mettler-Toledo QC protocol.
Why Is the Emerald-Green Dial Rolex Daytona Ref. 126508 Known as the "John Mayer" Edition?
The Rolex Cosmograph Daytona "John Mayer" Reference 126508 is a solid 18K yellow gold chronograph featuring a metallic emerald-green sunburst dial and 18K gold tachymeter bezel weighing 216.4g, because the collector nickname originated when horological collector John Mayer highlighted the green-and-gold reference as a modern Geneva icon.
5 Core CNC & Chronometric Specifications:
- Blueprint Reference: Custom Rolex Cosmograph Daytona John Mayer II Emerald & Gold Subdials 18K Yellow Gold — Official Ref. 126508 (SKU: AT-AU750-126508-W721).
- 5-Axis CNC Metallurgy: 18K Yellow Gold Au750 case (40.0 mm x 11.9 mm) and Hand-Finished 18K Yellow Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal with hand-polished chamfers.
- Verified Bench Mass: 216.4g 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 +0.5 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 18K Yellow Gold Ref. 116598TBR (216.8g) and the Rolex Cosmograph Daytona Iridescent Natural Mother-of-Pearl Dial 18K White Gold Ref. 126509 (216.3g).
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- Metallurgical & 4K QC Verification: Fischer XRF Au750 Protocol • 3-Year Mechanical Warranty • Insured Armored Delivery
How is the 18K Yellow Gold case of this Rolex 126508 machined?
Our Geneva CNC specialists mill the monobloc middle case, bezel, and bracelet geometry on 5-axis Swiss machining centers in 18K Yellow Gold Au750 to achieve the authentic 216.4g 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 +0.5 s/d, 297 deg on our Witschi Chronoscope alongside Fischer XRF and Mettler-Toledo gram scale verification.
What defines the Rolex Daytona John Mayer Green Dial Ref. 126508?
Rolex Daytona Reference 126508 pairs a solid 18K yellow gold case and Oyster bracelet (216.4g) with a sunburst emerald-green dial and gold-ringed chronograph counters powered by Rolex Manufacture Cal. 4131 - 72h Power Reserve.
Custom Rolex Cosmograph Daytona John Mayer II Emerald & Gold Subdials 18K Yellow Gold Ref. 126508
5-Axis Swiss CNC 18K Yellow Gold Au750 • 216.4g Verified Mass • Regulated Rolex Manufacture Cal. 4131 - 72h Power Reserve