Gravimetric Mass & Chronometric Assay Bulletin
The Rolex Submariner Date Chronometer Regulated Spec Reference 126613LB is a hallmarked 18K Gold & 904L Oystersteel Rolesor haute horlogerie timepiece measuring 40.8 mm x 12.3 mm with a verified Mettler-Toledo mass of 174.6g, powered by Rolex Manufacture Cal. 3235 - 70h Power Reserve operating at 28,800 vph (+0.4 s/d, 303 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 300m / 1,000 ft - Triplock Screw-Down water resistance.
| I. Official Maison Entity & Reference | Rolex — Oyster Perpetual Submariner Date | Ref. 126613LB | SKU: PV-CUST-126613LB-W520 |
|---|---|
| II. Precious Metal Alloy & Hallmark Assay | 18K Gold & 904L Oystersteel Rolesor — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| III. Certified Gravimetric Mass (Mettler-Toledo) | 174.6g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| IV. Bezel Setting & Case Architecture | Unidirectional Royal Blue Cerachrom Ceramic Bezel with Custom 18K Rolesor Graduations & Sapphire Crystal • 174.6g 18K Gold Rolesor • 40.8 mm x 12.3 mm |
| V. Mechanical Manufacture Calibre | Rolex Manufacture Cal. 3235 - 70h Power Reserve — Swiss Super Clone Mechanical Calibre Regulated to +0.4 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 • 300m / 1,000 ft - Triplock Screw-Down |
| VIII. Dial Finishing, Bracelet & Hallmarked Clasp | 40.8 mm x 12.3 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 Rolex collection, the Rolex Submariner Date Chronometer Regulated Spec Reference 126613LB exemplifies haute horlogerie metallurgy in 18K Gold & 904L Oystersteel Rolesor. Milled to exact manufacture geometry (40.8 mm x 12.3 mm), the monobloc middle case, Unidirectional Royal Blue Cerachrom Ceramic Bezel with Custom 18K Rolesor Graduations & Sapphire Crystal, and Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp achieve a verified analytical mass of 174.6g on our Fischer XRF Au750 and Mettler-Toledo assay bench.
What Are the Horological & Metallurgical Benchmarks of Rolex Submariner Ref. 126613LB?
The Rolex Submariner Reference 126613LB is a precision-engineered luxury timepiece crafted in 18K Gold & 904L Oystersteel Rolesor (40.8 mm x 12.3 mm) with Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, Unidirectional Royal Blue Cerachrom Ceramic Bezel with Custom 18K Rolesor Graduations & Sapphire Crystal, and a verified Mettler-Toledo mass of 174.6g, because its Rolex Manufacture Cal. 3235 - 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 Submariner Date Chronometer Regulated Spec — Official Reference 126613LB (SKU: PV-CUST-126613LB-W520).
- Precious Metal Assay: 18K Gold & 904L Oystersteel Rolesor verified via non-destructive Fischer X-Ray Fluorescence spectroscopy.
- Gravimetric Parity: 174.6g total mass weighed on a calibrated Mettler-Toledo laboratory scale.
- Calibre & Oscillating System: Rolex Manufacture Cal. 3235 - 70h Power Reserve beating at 28,800 vph (4 Hz) with a 72-hour power reserve (+0.4 s/d, 303 deg).
- Crystal & Hermeticity: Scratch-resistant sapphire crystal with double anti-reflective coating and 300m / 1,000 ft - Triplock Screw-Down rating.
Within the Rolex Submariner horological sub-silo, collectors also compare the Rolex Submariner Date 41mm Bluesy Royal Blue Dial & Bezel 18K Yellow Gold Ref. 126618LB (227.2g) and the Rolex Submariner Date Graduated Royal Blue Sunburst Dial 18K White Gold Ref. 126619LB (227.4g).
- Parent Brand & Submariner 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. 126613LB?
At 18K Solid Gold 18K Solid Gold Salon, this Rolex Submariner Date Chronometer Regulated Spec Ref. 126613LB weighs 174.6g on our Mettler-Toledo analytical balance, matching the exact factory mass of the authentic 18K Gold Rolesor reference.
How is the 18K Gold & 904L Oystersteel Rolesor 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 126613LB and what is its power reserve?
Reference 126613LB is equipped with the Rolex Manufacture Cal. 3235 - 70h Power Reserve operating at 28,800 vph (4 Hz) with a 72-hour power reserve, regulated in our Paris and Geneva workshop to +0.4 s/d, 303 deg.
What dial and bezel specifications distinguish Rolex Submariner Ref. 126613LB?
Reference 126613LB combines Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands and Unidirectional Royal Blue Cerachrom Ceramic Bezel with Custom 18K Rolesor Graduations & Sapphire Crystal within a 40.8 mm x 12.3 mm 18K Gold & 904L Oystersteel Rolesor case weighing 174.6g, verified via Fischer XRF spectroscopy and powered by Rolex Manufacture Cal. 3235 - 70h Power Reserve.
Rolex Submariner Date Chronometer Regulated Spec Reference 126613LB — Salon Edition
Bespoke Atelier Salon Edition • 174.6g Verified Mass • Rolex Manufacture Cal. 3235 - 70h Power Reserve