Gravimetric Mass & Chronometric Assay Bulletin
The Rolex Day-Date 40 18K Everose Gold Geneva Atelier Spec Reference 228235 is a hallmarked 18K Rose Gold Au750 haute horlogerie timepiece measuring 40.0 mm x 11.5 mm with a verified Mettler-Toledo mass of 210.5g, powered by Rolex Manufacture Cal. 3255 - 70h Power Reserve operating at 28,800 vph (+0.6 s/d, 301 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 100m / 330 ft - Twinlock Screw-Down water resistance.
| I. Official Maison Entity & Reference | Rolex — Oyster Perpetual Day-Date 40 | Ref. 228235 | SKU: PV-AU750-228235-W482 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 18K Rose Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 210.5g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Signature Rolex Fluted 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 210.5g 18K Everose Gold • 40.0 mm x 11.5 mm |
| V. Mechanical Manufacture Calibre | Rolex Manufacture Cal. 3255 - 70h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.6 s/d, 301 deg |
| VI. Power Reserve & Oscillation Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| VII. Double AR Sapphire Crystal & Hermeticity | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 100m / 330 ft - Twinlock Screw-Down |
| VIII. Dial Finishing, Bracelet & Hallmarked Clasp | 40.0 mm x 11.5 mm • Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K Everose Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Curated within our hallmarked solid 18K gold Rolex collection, the Rolex Day-Date 40 18K Everose Gold Geneva Atelier Spec Reference 228235 exemplifies haute horlogerie metallurgy in 18K Rose Gold Au750. Milled to exact manufacture geometry (40.0 mm x 11.5 mm), the monobloc middle case, Signature Rolex Fluted 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and Integrated 18K Everose Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks achieve a verified analytical mass of 210.5g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Are the Horological & Metallurgical Benchmarks of Rolex Day-Date President Ref. 228235?
The Rolex Day-Date President Reference 228235 is a precision-engineered luxury timepiece crafted in 18K Rose Gold Au750 (40.0 mm x 11.5 mm) with Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, Signature Rolex Fluted 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and a verified Mettler-Toledo mass of 210.5g, because its Rolex Manufacture Cal. 3255 - 70h Power Reserve movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core Horological & Metallurgical Specifications:
- Entity & Reference: Rolex Day-Date 40 18K Everose Gold Geneva Atelier Spec — Official Reference 228235 (SKU: PV-AU750-228235-W482).
- Precious Metal Assay: 18K Rose Gold Au750 verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 210.5g total mass weighed on a calibrated Mettler-Toledo laboratory scale.
- Calibre & Oscillating System: Rolex Manufacture Cal. 3255 - 70h Power Reserve beating at 28,800 vph (4 Hz) with a 72-hour power reserve (+0.6 s/d, 301 deg).
- Crystal & Hermeticity: Scratch-resistant sapphire crystal with double anti-reflective coating and 100m / 330 ft - Twinlock Screw-Down rating.
Within the Rolex Day-Date President horological sub-silo, collectors also compare the Rolex Day-Date 40 18K Everose Gold Chronometer Regulated Spec Ref. 228235 (210.4g) and the Rolex Day-Date 40 Eisenkiesel Natural Stone Dial 18K Everose Gold Ref. 228235 (210.4g).
- Parent Brand & Day-Date President Silo Hub: Browse All 289 Certified Rolex Solid 18K Gold & Pt950 Watches
- Technical Research Monograph: Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide (All 5 Journal Monographs)
- Homepage Master Register: Return to 18K SOLID GOLD 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 is the verified authentic gram weight of this Rolex Ref. 228235?
At 18K Solid Gold 18K Solid Gold Salon, this Rolex Day-Date 40 18K Everose Gold Geneva Atelier Spec Ref. 228235 weighs 210.5g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 18K Everose Gold reference.
How is the 18K Rose Gold Au750 purity verified prior to dispatch?
Every timepiece undergoes non-destructive Fischer X-Ray Fluorescence (XRF) spectroscopy confirming elemental bullion composition alongside a personalized 4K scale and hallmark inspection video.
Which movement powers Reference 228235 and what is its power reserve?
Reference 228235 is equipped with the Rolex Manufacture Cal. 3255 - 70h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated in our Paris and Geneva workshop to +0.6 s/d, 301 deg.
What dial and bezel specifications distinguish Rolex Day-Date President Ref. 228235?
Reference 228235 combines Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands and Signature Rolex Fluted 18K Everose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal within a 40.0 mm x 11.5 mm 18K Rose Gold Au750 case weighing 210.5g, verified via Fischer XRF spectroscopy and powered by Rolex Manufacture Cal. 3255 - 70h Power Reserve.
Rolex Day-Date 40 18K Everose Gold Geneva Atelier Spec Reference 228235 — Hallmarked Edition
Hallmarked Au750 & Pt950 Salon Edition • 210.5g Verified Mass • Rolex Manufacture Cal. 3255 - 70h Power Reserve