5-Axis CNC Metallurgy & Mettler-Toledo Gravimetric Verification
The Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial Reference Q1358420 is a Monte-Carlo registered luxury timepiece crafted in 904L Stainless Steel Custom Architecture (39.0 mm x 9.3 mm) with a verified Mettler-Toledo analytical weight of 68.8g, powered by Jaeger-LeCoultre Manufacture Cal. 925 / Cal. 899 beating at 28,800 vph (+0.5 s/d, 297 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 50m / 5 ATM water resistance.
| Entity, Maison & Official Reference | Jaeger-LeCoultre — Master Ultra Thin / Rendez-Vous | Ref. Q1358420 | SKU: MC-CUST-Q1358420-W361 |
|---|---|
| Precious Metal Alloy & XRF Purity | 904L Stainless Steel Custom Architecture — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| Verified Total Mass (Mettler-Toledo Scale) | 68.8g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Architecture & Gem-Setting Spec | Precision Brushed & Polished CNC Edition Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 68.8g 904L Steel Edition • 39.0 mm x 9.3 mm |
| Swiss Super Clone Movement Calibre | Jaeger-LeCoultre Manufacture Cal. 925 / Cal. 899 — Swiss Super Clone Mechanical Calibre Regulated to +0.5 s/d, 297 deg |
| Power Reserve & Oscillation Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| Double AR Sapphire Crystal & Water Resistance | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 50m / 5 ATM |
| Dial Finishing & Hallmarked Bracelet Clasp | 39.0 mm x 9.3 mm • Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands • Hand-Brushed & Chamfered Vulcanized Elastomer / Alligator Strap & Folding Clasp |
Recorded in our Monte-Carlo solid 18K gold Jaeger-LeCoultre register, the Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial Reference Q1358420 unites authentic Geneva proportions (39.0 mm x 9.3 mm) with a certified 904L Stainless Steel Custom Architecture mass of 68.8g. Every detail of the 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 hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.
5 Core Horological & Metallurgical Specifications:
- Registered Entity & Ref: Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial — Official Reference Q1358420 (SKU: MC-CUST-Q1358420-W361).
- Precious Metal Alloy: 904L Stainless Steel Custom Architecture with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
- Verified Reference Mass: 68.8g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
- Mechanical Calibre: Jaeger-LeCoultre Manufacture Cal. 925 / Cal. 899 operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.5 s/d, 297 deg).
- Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 50m / 5 ATM water resistance.
Within the same Jaeger-LeCoultre horological silo, collectors also compare the Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Ref. Q1358420 (68.6g) and the Jaeger-LeCoultre Master Ultra Thin Moonphase 39mm Free-Sprung Cal. 925 Ref. Q1368430 (68.5g).
What is the verified authentic weight of this Jaeger-LeCoultre Ref. Q1358420?
This Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial Ref. Q1358420 weighs 68.8g in 904L Stainless Steel Custom Architecture, matching the exact authentic factory weight on our Monte-Carlo showroom Mettler-Toledo analytical balance.
Are all 8 showroom photographs of Reference Q1358420 unedited studio shots?
Yes. All 8 gallery plates show the actual timepiece captured across multiple studio angles on our quality-control bench with zero stock renders.
Which movement powers Reference Q1358420 and how do I request the 4K QC video?
Reference Q1358420 is powered by the Jaeger-LeCoultre Manufacture Cal. 925 / Cal. 899 (28,800 vph, 72-hour power reserve, regulated to +0.5 s/d, 297 deg). Message our Monte-Carlo Private Client Concierge on WhatsApp (+1 305 724 0661) for your personalized 4K video dossier.
Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial Ref. Q1358420
Monte-Carlo Reference Register • 68.8g 904L Stainless Steel Custom Architecture • Jaeger-LeCoultre Manufacture Cal. 925 / Cal. 899
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