Gravimetric Mass & Chronometric Assay Bulletin
The Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Reference 228396TBR is a hallmarked 950 Platinum Pt950 haute horlogerie timepiece measuring 40.0 mm x 11.5 mm with a verified Mettler-Toledo mass of 280.6g, powered by Rolex Manufacture Cal. 3255 - 70h Power Reserve operating at 28,800 vph (+0.7 s/d, 303 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. 228396TBR | SKU: PV-AU750-228396TBR-W88 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 950 Platinum Pt950 — Pt950 — 95.0% Pure Platinum Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 280.6g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Off-Catalog 950 Platinum Pt950 Bezel Set with 36 Trapeze-Cut Baguette VVS Diamonds (TBR — Taille Baguette Diamants) • 280.6g 950 Platinum • 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 +0.7 s/d, 303 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 • Diamond-Set Bezel with Solid 18K Gold Applied Hour Markers & Hands • Integrated 950 Platinum Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Curated within our hallmarked solid 18K gold Rolex collection, the Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Reference 228396TBR exemplifies haute horlogerie metallurgy in 950 Platinum Pt950. Milled to exact manufacture geometry (40.0 mm x 11.5 mm), the monobloc middle case, Off-Catalog 950 Platinum Pt950 Bezel Set with 36 Trapeze-Cut Baguette VVS Diamonds (TBR — Taille Baguette Diamants), and Integrated 950 Platinum Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks achieve a verified analytical mass of 280.6g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Does the TBR Baguette Diamond Designation Mean on Rolex Ref. 228396TBR?
The Rolex Day-Date President Reference 228396TBR is an off-catalog high-jewelry timepiece in 950 Platinum Pt950 equipped with 36 trapeze-cut baguette VVS diamonds on the bezel (TBR — Taille Baguette Diamants) and a verified mass of 280.6g, because off-catalog TBR allocations replace the standard tachymeter or fluted bezel with hand-matched baguette diamond channels.
5 Core Horological & Metallurgical Specifications:
- Entity & Reference: Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum — Official Reference 228396TBR (SKU: PV-AU750-228396TBR-W88).
- Precious Metal Assay: 950 Platinum Pt950 verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 280.6g 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 (+0.7 s/d, 303 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 Yellow Gold Geneva Atelier Spec Ref. 228238 (210.9g) and the Rolex Day-Date 40 18K Everose Gold Hand-Chamfered Bevel Spec 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. 228396TBR?
At 18K Solid Gold 18K Solid Gold Salon, this Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Ref. 228396TBR weighs 280.6g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 950 Platinum reference.
How is the 950 Platinum Pt950 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 228396TBR and what is its power reserve?
Reference 228396TBR 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 +0.7 s/d, 303 deg.
What does the TBR suffix mean on Rolex Day-Date President Ref. 228396TBR?
The TBR horological suffix designates Taille Baguette Diamants: 36 precision-cut baguette VVS diamonds channel-set into the 950 Platinum Pt950 bezel of this 280.6g off-catalog Rolex Reference 228396TBR.
Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Reference 228396TBR — Hallmarked Edition
Hallmarked Au750 & Pt950 Salon Edition • 280.6g Verified Mass • Rolex Manufacture Cal. 3255 - 70h Power Reserve