Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Rolex Datejust 36 Graduated Royal Blue Sunburst Dial Reference 126231 is a direct Swiss foundry specimen engineered in 18K Gold & 904L Oystersteel Rolesor (36.0 mm x 11.8 mm) with a certified Mettler-Toledo mass of 130.7g, Fischer XRF Au750 metallurgical verification, and Rolex Manufacture Cal. 3235 - 70h Power Reserve running at 28,800 vph (+0.6 s/d, 296 deg) with a 72-hour power reserve and 100m / 330 ft - Twinlock Screw-Down rating.
Catalogued in our direct Swiss foundry Rolex assay archive under Specimen Code LAB-CNC-126231-W162, this Rolex Datejust 36 Graduated Royal Blue Sunburst Dial Reference 126231 is smelted and CNC-machined in 18K Gold & 904L Oystersteel Rolesor (36.0 mm x 11.8 mm). Prior to archival release, the completed assembly is weighed on a calibrated Mettler-Toledo balance at 130.7g and scanned via non-destructive Fischer XRF spectroscopy.
What Are the Horological & Metallurgical Benchmarks of Rolex Datejust Ref. 126231?
The Rolex Datejust Reference 126231 is a precision-engineered luxury timepiece crafted in 18K Gold & 904L Oystersteel Rolesor (36.0 mm x 11.8 mm) with Graduated Royal Blue Sunburst Dial with Hand-Finished Luminous Appliques & Hands, Signature Rolex Fluted 18K Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and a verified Mettler-Toledo mass of 130.7g, because its Rolex Manufacture Cal. 3235 - 70h Power Reserve movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: Rolex Datejust 36 Graduated Royal Blue Sunburst Dial — Official Ref. 126231 (Specimen LAB-CNC-126231-W162).
- XRF Metallurgical Assay: 18K Gold & 904L Oystersteel Rolesor certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 130.7g verified gravimetric parity matching the authentic manufacture reference.
- Chronometric Calibre: Rolex Manufacture Cal. 3235 - 70h Power Reserve beating at 28,800 vph (4 Hz) with 72-hour reserve and +0.6 s/d, 296 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Graduated Royal Blue Sunburst Dial with Hand-Finished Luminous Appliques & Hands, and 100m / 330 ft - Twinlock Screw-Down barometric sealing.
Within the Rolex Datejust horological sub-silo, collectors also compare the Rolex Datejust 41 Geneva Atelier Spec Ref. 126300 (136.6g) and the Rolex Datejust 41 Geneva Atelier Spec Ref. 126331 (150.7g).
- Parent Brand & Datejust 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 126231 (Rolex)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (130.7g), a Fischer XRF spectrometer (18K Gold & 904L Oystersteel Rolesor), and a Witschi Chronoscope (+0.6 s/d, 296 deg).
Does the 130.7g reading match the authentic original Rolex 126231 weight?
Yes. Our CNC foundry machines the 18K Gold Rolesor case and bracelet to replicate the exact 130.7g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference 126231?
Reference 126231 is powered by the Rolex Manufacture Cal. 3235 - 70h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated across six positions to +0.6 s/d, 296 deg.
What dial and bezel specifications distinguish Rolex Datejust Ref. 126231?
Reference 126231 combines Graduated Royal Blue Sunburst Dial with Hand-Finished Luminous Appliques & Hands and Signature Rolex Fluted 18K Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal within a 36.0 mm x 11.8 mm 18K Gold & 904L Oystersteel Rolesor case weighing 130.7g, verified via Fischer XRF spectroscopy and powered by Rolex Manufacture Cal. 3235 - 70h Power Reserve.
Rolex Datejust 36 Graduated Royal Blue Sunburst Dial Ref. 126231 — XRF Certified Edition
Fischer XRF Verified 18K Gold & 904L Oystersteel Rolesor • Mettler-Toledo 130.7g • Rolex Manufacture Cal. 3235 - 70h Power Reserve
| Assay Specimen ID & Official Reference | Rolex — Oyster Perpetual Datejust 36 | Ref. 126231 | SKU: LAB-CNC-126231-W162 |
|---|---|
| Fischer XRF Elemental Purity & Alloy | 18K Gold & 904L Oystersteel Rolesor — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| Mettler-Toledo Gravimetric Mass (g) | 130.7g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Tolerance, Gem-Setting & Case Dimension | Signature Rolex Fluted 18K Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 130.7g 18K Gold Rolesor • 36.0 mm x 11.8 mm |
| Calibre Reference & Witschi Chronometry | Rolex Manufacture Cal. 3235 - 70h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.6 s/d, 296 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 - Twinlock Screw-Down |
| Dial Metallurgy & Clasp Hallmark Verification | 36.0 mm x 11.8 mm • Graduated Royal Blue Sunburst Dial with Hand-Finished Luminous Appliques & Hands • Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp |