Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Rolex Cosmograph Daytona Le Mans 100th Anniversary 18K White Gold Free-Sprung Calibre Reference 126529LN is a direct Swiss foundry specimen engineered in 18K White Gold Au750 (40.0 mm x 11.9 mm) with a certified Mettler-Toledo mass of 216.7g, Fischer XRF Au750 metallurgical verification, and Rolex Manufacture Cal. 4132 - 24h Le Mans running at 28,800 vph (+0.4 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-126529LN-W475, this Rolex Cosmograph Daytona Le Mans 100th Anniversary 18K White Gold Free-Sprung Calibre Reference 126529LN is smelted and CNC-machined in 18K White 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 216.7g and scanned via non-destructive Fischer XRF spectroscopy.
What Distinguishes the Rolex Daytona "Le Mans" Centenary Ref. 126529LN?
The Rolex Cosmograph Daytona "Le Mans" Reference 126529LN is a commemorative solid 18K White Gold Au750 chronograph featuring a red "100" on the Cerachrom tachymeter bezel, Paul Newman reverse-panda exotic subdials, and Rolex Manufacture Cal. 4132 - 24h Le Mans inside a 216.7g case, because the reference celebrates the 100th anniversary of the 24 Hours of Le Mans endurance race.
5 Core Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: Rolex Cosmograph Daytona Le Mans 100th Anniversary 18K White Gold Free-Sprung Calibre — Official Ref. 126529LN (Specimen LAB-XRF-126529LN-W475).
- XRF Metallurgical Assay: 18K White Gold Au750 certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 216.7g verified gravimetric parity matching the authentic manufacture reference.
- Chronometric Calibre: Rolex Manufacture Cal. 4132 - 24h Le Mans beating at 28,800 vph (4 Hz) with 72-hour reserve and +0.4 s/d, 303 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Reverse-Panda Sunburst Dial with Paul Newman Exotic Chronograph Subdials and 24-Hour Totalizer, and 100m / 330 ft - Triplock Screw-Down barometric sealing.
Within the Rolex Cosmograph Daytona horological sub-silo, collectors also compare the Rolex Cosmograph Daytona Diamond-Set Bezel 18K White Gold Ref. 126539TBR (160.8g) and the Rolex Cosmograph Daytona Black Obsidian Dial & Sapphire Bezel 18K White Gold Geneva Atelier Spec Ref. 126599TSA (216.9g).
- 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 126529LN (Rolex)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (216.7g), a Fischer XRF spectrometer (18K White Gold Au750), and a Witschi Chronoscope (+0.4 s/d, 303 deg).
Does the 216.7g reading match the authentic original Rolex 126529LN weight?
Yes. Our CNC foundry machines the 18K White Gold case and bracelet to replicate the exact 216.7g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference 126529LN?
Reference 126529LN is powered by the Rolex Manufacture Cal. 4132 - 24h Le Mans operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated across six positions to +0.4 s/d, 303 deg.
Why does Rolex Daytona Le Mans Ref. 126529LN feature a red 100 on the Cerachrom bezel?
Reference 126529LN commemorates the centenary of the 24 Hours of Le Mans endurance race with a red "100" in ceramic on the tachymeter scale, Paul Newman-inspired lollipop subdial markers, and a verified 18K White Gold Au750 mass of 216.7g.
Rolex Cosmograph Daytona Le Mans 100th Anniversary 18K White Gold Free-Sprung Calibre Ref. 126529LN — XRF Certified Edition
Fischer XRF Verified 18K White Gold Au750 • Mettler-Toledo 216.7g • Rolex Manufacture Cal. 4132 - 24h Le Mans
| Assay Specimen ID & Official Reference | Rolex — Oyster Perpetual Cosmograph Daytona | Ref. 126529LN | SKU: LAB-XRF-126529LN-W475 |
|---|---|
| Fischer XRF Elemental Purity & Alloy | 18K White Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| Mettler-Toledo Gravimetric Mass (g) | 216.7g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Tolerance, Gem-Setting & Case Dimension | Monobloc Black Cerachrom Bezel with Red "100" Ceramic Tachymeter Numeral Commemorating the 24 Hours of Le Mans Centenary • 216.7g 18K White Gold • 40.0 mm x 11.9 mm |
| Calibre Reference & Witschi Chronometry | Rolex Manufacture Cal. 4132 - 24h Le Mans — Swiss Super Clone Mechanical Calibre Regulated to +0.4 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 • Reverse-Panda Sunburst Dial with Paul Newman Exotic Chronograph Subdials and 24-Hour Totalizer • Integrated 18K White Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |