Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The IWC Schaffhausen IWC Portugieser Chronograph 40.9mm Silver Dial Reference IW371445 is a direct Swiss foundry specimen engineered in 904L Stainless Steel Custom Architecture (41.0 mm x 13.0 mm) with a certified Mettler-Toledo mass of 81.5g, Fischer XRF Au750 metallurgical verification, and IWC Manufacture Cal. 69355 / Cal. 52010 running at 28,800 vph (+0.8 s/d, 300 deg) with a 72-hour power reserve and 60m / 6 ATM rating.
Catalogued in our direct Swiss foundry IWC Schaffhausen assay archive under Specimen Code LAB-CNC-IW371445-W544, this IWC Schaffhausen IWC Portugieser Chronograph 40.9mm Silver Dial Reference IW371445 is smelted and CNC-machined in 904L Stainless Steel Custom Architecture (41.0 mm x 13.0 mm). Prior to archival release, the completed assembly is weighed on a calibrated Mettler-Toledo balance at 81.5g and scanned via non-destructive Fischer XRF spectroscopy.
What Are the Horological & Metallurgical Benchmarks of IWC Schaffhausen Portugieser Ref. IW371445?
The IWC Schaffhausen Portugieser Reference IW371445 is a precision-engineered luxury timepiece crafted in 904L Stainless Steel Custom Architecture (41.0 mm x 13.0 mm) with Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and a verified Mettler-Toledo mass of 81.5g, because its IWC Manufacture Cal. 69355 / Cal. 52010 movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core Foundry & Laboratory Assay Specifications:
- Foundry Specimen Entity: IWC Schaffhausen IWC Portugieser Chronograph 40.9mm Silver Dial — Official Ref. IW371445 (Specimen LAB-CNC-IW371445-W544).
- XRF Metallurgical Assay: 904L Stainless Steel Custom Architecture certified for elemental composition and hallmark integrity.
- Mettler-Toledo Mass: 81.5g verified gravimetric parity matching the authentic manufacture reference.
- Chronometric Calibre: IWC Manufacture Cal. 69355 / Cal. 52010 beating at 28,800 vph (4 Hz) with 72-hour reserve and +0.8 s/d, 300 deg Witschi trace.
- Optical & Pressure Testing: Double anti-reflective sapphire crystal, Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, and 60m / 6 ATM barometric sealing.
Within the IWC Schaffhausen Portugieser horological sub-silo, collectors also compare the IWC Schaffhausen IWC Portugieser Chronograph 41mm Silver-Plated Dial Ref. IW371445 (81.4g) and the IWC Schaffhausen IWC Portugieser Chronograph 40.9mm Cal. 79350 Ref. IW371482 (81.8g).
- Parent Brand & Portugieser Silo Hub: Browse All 8 Certified IWC Schaffhausen 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 IW371445 (IWC Schaffhausen)?
Every 18K Factory specimen is verified on three calibrated instruments on 4K video: a Mettler-Toledo analytical balance (81.5g), a Fischer XRF spectrometer (904L Stainless Steel Custom Architecture), and a Witschi Chronoscope (+0.8 s/d, 300 deg).
Does the 81.5g reading match the authentic original IWC Schaffhausen IW371445 weight?
Yes. Our CNC foundry machines the 904L Steel Edition case and bracelet to replicate the exact 81.5g reference mass of the authentic manufacture timepiece.
What are the movement specifications for Reference IW371445?
Reference IW371445 is powered by the IWC Manufacture Cal. 69355 / Cal. 52010 operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated across six positions to +0.8 s/d, 300 deg.
What dial and bezel specifications distinguish IWC Schaffhausen Portugieser Ref. IW371445?
Reference IW371445 combines Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands and Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal within a 41.0 mm x 13.0 mm 904L Stainless Steel Custom Architecture case weighing 81.5g, verified via Fischer XRF spectroscopy and powered by IWC Manufacture Cal. 69355 / Cal. 52010.
IWC Schaffhausen IWC Portugieser Chronograph 40.9mm Silver Dial Ref. IW371445 — XRF Certified Edition
Fischer XRF Verified 904L Stainless Steel Custom Architecture • Mettler-Toledo 81.5g • IWC Manufacture Cal. 69355 / Cal. 52010
| Assay Specimen ID & Official Reference | IWC Schaffhausen — Portugieser / Pilot / Ingenieur Collection | Ref. IW371445 | SKU: LAB-CNC-IW371445-W544 |
|---|---|
| Fischer XRF Elemental Purity & Alloy | 904L Stainless Steel Custom Architecture — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| Mettler-Toledo Gravimetric Mass (g) | 81.5g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Tolerance, Gem-Setting & Case Dimension | Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 81.5g 904L Steel Edition • 41.0 mm x 13.0 mm |
| Calibre Reference & Witschi Chronometry | IWC Manufacture Cal. 69355 / Cal. 52010 — Swiss Super Clone Mechanical Calibre Regulated to +0.8 s/d, 300 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 • 60m / 6 ATM |
| Dial Metallurgy & Clasp Hallmark Verification | 41.0 mm x 13.0 mm • Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands • Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp |