Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Reference 126538TBR is a direct Swiss foundry specimen engineered in 18K Yellow Gold Au750 (40.0 mm x 11.9 mm) with a certified Mettler-Toledo mass of 160.3g, Fischer XRF Au750 metallurgical verification, and Rolex Manufacture Cal. 4131 - 72h Power Reserve running at 28,800 vph (+0.5 s/d, 303 deg) with a 72-hour power reserve and 100m / 330 ft - Triplock Screw-Down rating.
Catalogued in our direct Swiss foundry Rolex assay archive under Specimen Code LAB-XRF-126538TBR-W61, this Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Reference 126538TBR is smelted and CNC-machined in 18K Yellow Gold Au750 (40.0 mm x 11.9 mm). Prior to archival release, the completed assembly is weighed on a calibrated Mettler-Toledo balance at 160.3g and scanned via non-destructive Fischer XRF spectroscopy.
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 Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold — Official Ref. 126538TBR (Specimen LAB-XRF-126538TBR-W61).
- XRF Metallurgical Assay: 18K Yellow Gold Au750 certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 160.3g verified gravimetric parity matching the authentic manufacture reference.
- Chronometric Calibre: Rolex Manufacture Cal. 4131 - 72h Power Reserve beating at 28,800 vph (4 Hz) with 72-hour reserve and +0.5 s/d, 303 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, and 100m / 330 ft - Triplock Screw-Down barometric sealing.
Within the Rolex Cosmograph Daytona horological sub-silo, collectors also compare the Rolex Cosmograph Daytona Crimson Rubellite Dial & Ruby Bezel 18K Everose Gold Ref. 126505 (216.6g) and the Rolex Cosmograph Daytona Gibeon Meteorite Dial 18K Everose Gold Ref. 116505 (216.1g).
- Parent Brand & Cosmograph Daytona Silo Hub: Browse All 289 Certified Rolex Solid 18K Gold & Pt950 Watches
- Technical Research Monograph: Fischer XRF Au750 Spectrometry Watch Authentication SOP-750 (All 5 Journal Monographs)
- Homepage Master Register: Return to 18K FACTORY 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 laboratory instruments certify Reference 126538TBR (Rolex)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (160.3g), a Fischer XRF spectrometer (18K Yellow Gold Au750), and a Witschi Chronoscope (+0.5 s/d, 303 deg).
Does the 160.3g reading match the authentic original Rolex 126538TBR weight?
Yes. Our CNC foundry machines the 18K Yellow Gold case and bracelet to replicate the exact 160.3g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference 126538TBR?
Reference 126538TBR is powered by the Rolex Manufacture Cal. 4131 - 72h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated across six positions to +0.5 s/d, 303 deg.
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.
Rolex Cosmograph Daytona Barbie Pink Opal & Ruby 18K Yellow Gold Ref. 126538TBR — XRF Certified Edition
Fischer XRF Verified 18K Yellow Gold Au750 • Mettler-Toledo 160.3g • Rolex Manufacture Cal. 4131 - 72h Power Reserve
| Assay Specimen ID & Official Reference | Rolex — Oyster Perpetual Cosmograph Daytona | Ref. 126538TBR | SKU: LAB-XRF-126538TBR-W61 |
|---|---|
| Fischer XRF Elemental Purity & Alloy | 18K Yellow Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| Mettler-Toledo Gravimetric Mass (g) | 160.3g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Tolerance, Gem-Setting & Case Dimension | 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 |
| Calibre Reference & Witschi Chronometry | Rolex Manufacture Cal. 4131 - 72h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.5 s/d, 303 deg |
| Isochronism Frequency & Autonomous Power Reserve | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| Double AR Sapphire Crystal & Barometric Rating | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 100m / 330 ft - Triplock Screw-Down |
| Dial Metallurgy & Clasp Hallmark Verification | 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 |