Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Rolex Cosmograph Daytona Rainbow 36 Graduated Sapphires & Pave Dial 18K Yellow Gold Reference 126598RBOW 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 216.5g, Fischer XRF Au750 metallurgical verification, and Rolex Manufacture Cal. 4131 - 72h Power Reserve running at 28,800 vph (+0.5 s/d, 301 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-126598RBOW-W4, this Rolex Cosmograph Daytona Rainbow 36 Graduated Sapphires & Pave Dial 18K Yellow Gold Reference 126598RBOW 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 216.5g and scanned via non-destructive Fischer XRF spectroscopy.
How Are the 36 Graduated Rainbow Baguette Sapphires Set on Rolex Ref. 126598RBOW?
The Rolex Cosmograph Daytona Reference 126598RBOW "Rainbow" is an off-catalog haute joaillerie chronograph crafted in 18K Yellow Gold Au750 and set with 36 graduated spectrum baguette-cut sapphires on the bezel plus 56 brilliant-cut diamonds on the lugs and crown guards, because chromatically matched sapphire crystals require micron-level channel setting to maintain 216.5g reference mass.
5 Core Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: Rolex Cosmograph Daytona Rainbow 36 Graduated Sapphires & Pave Dial 18K Yellow Gold — Official Ref. 126598RBOW (Specimen LAB-XRF-126598RBOW-W4).
- XRF Metallurgical Assay: 18K Yellow Gold Au750 certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 216.5g 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, 301 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Full Diamond Pave & Black Lacquer Dial with Rainbow Sapphire Hour Markers & 18K Yellow Gold 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 Beach Roman Mother-of-Pearl Dial 18K White Gold Ref. 116519 (139.0g) and the Rolex Cosmograph Daytona Malachite Stone Dial 18K White Gold Ref. 126509 (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 126598RBOW (Rolex)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (216.5g), a Fischer XRF spectrometer (18K Yellow Gold Au750), and a Witschi Chronoscope (+0.5 s/d, 301 deg).
Does the 216.5g reading match the authentic original Rolex 126598RBOW weight?
Yes. Our CNC foundry machines the 18K Yellow Gold case and bracelet to replicate the exact 216.5g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference 126598RBOW?
Reference 126598RBOW 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, 301 deg.
How many baguette-cut sapphires and diamonds are set on Rolex Rainbow Ref. 126598RBOW?
Reference 126598RBOW features 36 chromatically graduated rainbow baguette-cut sapphires flush-set into the 18K Yellow Gold Au750 bezel alongside 56 brilliant-cut VVS diamonds across the case lugs and crown guards, maintaining a verified total mass of 216.5g.
Rolex Cosmograph Daytona Rainbow 36 Graduated Sapphires & Pave Dial 18K Yellow Gold Ref. 126598RBOW — XRF Certified Edition
Fischer XRF Verified 18K Yellow Gold Au750 • Mettler-Toledo 216.5g • Rolex Manufacture Cal. 4131 - 72h Power Reserve
| Assay Specimen ID & Official Reference | Rolex — Oyster Perpetual Cosmograph Daytona | Ref. 126598RBOW | SKU: LAB-XRF-126598RBOW-W4 |
|---|---|
| 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) | 216.5g — 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 Graduated Rainbow Baguette-Cut Sapphires and 56 Brilliant-Cut VVS Diamonds on Lugs and Crown Guards • 216.5g 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, 301 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 • Full Diamond Pave & Black Lacquer Dial with Rainbow Sapphire Hour Markers & 18K Yellow Gold Hands • Integrated Solid 18K Yellow Gold Oyster Bracelet with Oysterlock Folding Safety Clasp |