Gravimetric Mass & Chronometric Assay Bulletin
The Omega Seamaster Aqua Terra 150M 41.5mm Cal. 8501 Reference 231.10.42.21.03.001 is a hallmarked 904L Stainless Steel Custom Architecture haute horlogerie timepiece measuring 41.0 mm x 13.2 mm with a verified Mettler-Toledo mass of 149.6g, powered by Omega Co-Axial Master Chronometer Cal. 8900 operating at 28,800 vph (+0.6 s/d, 302 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 150m / 15 ATM water resistance.
| I. Official Maison Entity & Reference | Omega — Seamaster / De Ville Co-Axial Collection | Ref. 231.10.42.21.03.001 | SKU: PV-CUST-231.10.42.21.03.001-W357 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 904L Stainless Steel Custom Architecture — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 149.6g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 149.6g 904L Steel Edition • 41.0 mm x 13.2 mm |
| V. Mechanical Manufacture Calibre | Omega Co-Axial Master Chronometer Cal. 8900 — Swiss Super Clone Mechanical Calibre Regulated to +0.6 s/d, 302 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 • 150m / 15 ATM |
| VIII. Dial Finishing, Bracelet & Hallmarked Clasp | 41.0 mm x 13.2 mm • Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands • Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp |
Curated within our hallmarked solid 18K gold Omega collection, the Omega Seamaster Aqua Terra 150M 41.5mm Cal. 8501 Reference 231.10.42.21.03.001 exemplifies haute horlogerie metallurgy in 904L Stainless Steel Custom Architecture. Milled to exact manufacture geometry (41.0 mm x 13.2 mm), the monobloc middle case, Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp achieve a verified analytical mass of 149.6g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Are the Horological & Metallurgical Benchmarks of Omega Seamaster Ref. 231.10.42.21.03.001?
The Omega Seamaster Reference 231.10.42.21.03.001 is a precision-engineered luxury timepiece crafted in 904L Stainless Steel Custom Architecture (41.0 mm x 13.2 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 149.6g, because its Omega Co-Axial Master Chronometer Cal. 8900 movement is regulated across six positions to chronometric tolerances with a 72-hour power reserve.
5 Core Horological & Metallurgical Specifications:
- Entity & Reference: Omega Seamaster Aqua Terra 150M 41.5mm Cal. 8501 — Official Reference 231.10.42.21.03.001 (SKU: PV-CUST-231.10.42.21.03.001-W357).
- Precious Metal Assay: 904L Stainless Steel Custom Architecture verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 149.6g total mass weighed on a calibrated Mettler-Toledo laboratory scale.
- Calibre & Oscillating System: Omega Co-Axial Master Chronometer Cal. 8900 beating at 28,800 vph (4 Hz) with a 72-hour power reserve (+0.6 s/d, 302 deg).
- Crystal & Hermeticity: Scratch-resistant sapphire crystal with double anti-reflective coating and 150m / 15 ATM rating.
Within the Omega Seamaster horological sub-silo, collectors also compare the Omega Heritage Seamaster 300 Big Triangle Military Vintage 41mm Ref. 165.024 (104.9g) and the Omega Seamaster Aqua Terra Worldtimer 45.5mm Ref. 215.92.46.22.01.006 (126.4g).
- Parent Brand & Seamaster Silo Hub: Browse All 4 Certified Omega 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 Omega Ref. 231.10.42.21.03.001?
At 18K Solid Gold 18K Solid Gold Salon, this Omega Seamaster Aqua Terra 150M 41.5mm Cal. 8501 Ref. 231.10.42.21.03.001 weighs 149.6g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 904L Steel Edition reference.
How is the 904L Stainless Steel Custom Architecture 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 231.10.42.21.03.001 and what is its power reserve?
Reference 231.10.42.21.03.001 is equipped with the Omega Co-Axial Master Chronometer Cal. 8900 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, 302 deg.
What dial and bezel specifications distinguish Omega Seamaster Ref. 231.10.42.21.03.001?
Reference 231.10.42.21.03.001 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 13.2 mm 904L Stainless Steel Custom Architecture case weighing 149.6g, verified via Fischer XRF spectroscopy and powered by Omega Co-Axial Master Chronometer Cal. 8900.
Omega Seamaster Aqua Terra 150M 41.5mm Cal. 8501 Reference 231.10.42.21.03.001 — Salon Edition
Bespoke Atelier Salon Edition • 149.6g Verified Mass • Omega Co-Axial Master Chronometer Cal. 8900