Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Reference 228396TBR is a direct Swiss foundry specimen engineered in 950 Platinum Pt950 (40.0 mm x 11.5 mm) with a certified Mettler-Toledo mass of 280.6g, Fischer XRF Au750 metallurgical verification, and Rolex Manufacture Cal. 3255 - 70h Power Reserve running at 28,800 vph (+0.7 s/d, 303 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-XRF-228396TBR-W88, this Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Reference 228396TBR is smelted and CNC-machined in 950 Platinum Pt950 (40.0 mm x 11.5 mm). Prior to archival release, the completed assembly is weighed on a calibrated Mettler-Toledo balance at 280.6g and scanned via non-destructive Fischer XRF spectroscopy.
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 Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum — Official Ref. 228396TBR (Specimen LAB-XRF-228396TBR-W88).
- XRF Metallurgical Assay: 950 Platinum Pt950 certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 280.6g verified gravimetric parity matching the authentic manufacture reference.
- Chronometric Calibre: Rolex Manufacture Cal. 3255 - 70h Power Reserve beating at 28,800 vph (4 Hz) with 72-hour reserve and +0.7 s/d, 303 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Diamond-Set Bezel with Solid 18K Gold Applied Hour Markers & Hands, and 100m / 330 ft - Twinlock Screw-Down barometric sealing.
Within the Rolex Day-Date President horological sub-silo, collectors also compare the Rolex Day-Date 36 Natural Ferrite Stone Dial 18K Yellow Gold Ref. 18238 (141.5g) and the Rolex Day-Date 40 Iridescent Natural Mother-of-Pearl Dial 18K White Gold Ref. 228239 (210.5g).
- Parent Brand & Day-Date President 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 228396TBR (Rolex)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (280.6g), a Fischer XRF spectrometer (950 Platinum Pt950), and a Witschi Chronoscope (+0.7 s/d, 303 deg).
Does the 280.6g reading match the authentic original Rolex 228396TBR weight?
Yes. Our CNC foundry machines the 950 Platinum case and bracelet to replicate the exact 280.6g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference 228396TBR?
Reference 228396TBR is powered by the Rolex Manufacture Cal. 3255 - 70h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated across six positions 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 Ref. 228396TBR — XRF Certified Edition
Fischer XRF Verified 950 Platinum Pt950 • Mettler-Toledo 280.6g • Rolex Manufacture Cal. 3255 - 70h Power Reserve
| Assay Specimen ID & Official Reference | Rolex — Oyster Perpetual Day-Date 40 | Ref. 228396TBR | SKU: LAB-XRF-228396TBR-W88 |
|---|---|
| Fischer XRF Elemental Purity & Alloy | 950 Platinum Pt950 — Pt950 — 95.0% Pure Platinum Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| Mettler-Toledo Gravimetric Mass (g) | 280.6g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Tolerance, Gem-Setting & Case Dimension | 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 |
| Calibre Reference & Witschi Chronometry | Rolex Manufacture Cal. 3255 - 70h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.7 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 - Twinlock Screw-Down |
| Dial Metallurgy & Clasp Hallmark Verification | 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 |