5-Axis CNC & Horological Architecture
The Custom Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Reference 126538TBR is a 5-axis Swiss CNC commission machined in 18K Yellow Gold Au750 (40.0 mm x 11.9 mm) weighing 160.3g on our Mettler-Toledo analytical balance, driven by Rolex Manufacture Cal. 4131 - 72h Power Reserve regulated to +0.5 s/d, 303 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. 126538TBR | SKU: AT-AU750-126538TBR-W61 |
|---|---|
| 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) | 160.3g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| 04 / Custom Bezel, Gem-Setting & Case Geometry | Off-Catalog 18K Yellow Gold Au750 Bezel Set with 36 Trapeze-Cut Baguette VVS Diamonds (TBR — Taille Baguette Diamants) • 160.3g 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, 303 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 • Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K Yellow Gold Hand-Stitched Alligator / Elastomer Strap & Solid Gold Folding Clasp with Deep Laser Hallmarks |
Engineered inside our Geneva 5-axis CNC Rolex custom atelier, the Custom Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Reference 126538TBR 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 Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands is hand-finished on our watchmaker bench, yielding a certified reference weight of 160.3g verified under our Fischer XRF and Mettler-Toledo QC protocol.
What Does the TBR Baguette Diamond Designation Mean on Rolex Ref. 126538TBR?
The Rolex Cosmograph Daytona "Barbie" Reference 126538TBR is an off-catalog high-jewelry timepiece in 18K Yellow Gold Au750 equipped with 36 trapeze-cut baguette VVS diamonds on the bezel (TBR — Taille Baguette Diamants) and a verified mass of 160.3g, because off-catalog TBR allocations replace the standard tachymeter or fluted bezel with hand-matched baguette diamond channels.
5 Core CNC & Chronometric Specifications:
- Blueprint Reference: Custom Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold — Official Ref. 126538TBR (SKU: AT-AU750-126538TBR-W61).
- 5-Axis CNC Metallurgy: 18K Yellow Gold Au750 case (40.0 mm x 11.9 mm) and Off-Catalog 18K Yellow Gold Au750 Bezel Set with 36 Trapeze-Cut Baguette VVS Diamonds (TBR — Taille Baguette Diamants) with hand-polished chamfers.
- Verified Bench Mass: 160.3g 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, 303 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 Everose Gold Deep Crystal Optics Ref. 126515LN (160.1g) and the Rolex Cosmograph Daytona 18K Yellow Gold Ref. 116518LN (160.3g).
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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 126538TBR 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 160.3g 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, 303 deg on our Witschi Chronoscope alongside Fischer XRF and Mettler-Toledo gram scale verification.
What does the TBR suffix mean on Rolex Cosmograph Daytona Ref. 126538TBR?
The TBR horological suffix designates Taille Baguette Diamants: 36 precision-cut baguette VVS diamonds channel-set into the 18K Yellow Gold Au750 bezel of this 160.3g off-catalog Rolex Reference 126538TBR.
Custom Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Ref. 126538TBR
5-Axis Swiss CNC 18K Yellow Gold Au750 • 160.3g Verified Mass • Regulated Rolex Manufacture Cal. 4131 - 72h Power Reserve