18K WATCHES
PLACE DU CASINO, MONTE-CARLO & RUE DU RHÔNE GENEVA SALON FISCHER XRF Au750 (75.0%) SOLID 18K GOLD & PT950 CERTIFIED PRIVATE CLIENT ALLOCATION • INSURED ARMORED VAULT DELIVERY
18K WATCHES MONTE-CARLO • GENÈVE
Jaeger-LeCoultre Master Ultra Thin Small Seconds 39mm Cal. 896 Authentic OEM Dial Ref. Q1358420
01 • Front Dial Portrait (1 / 8)
METALLURGICAL & CHRONOMETRIC DOSSIER

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 ReferenceJaeger-LeCoultre — Master Ultra Thin / Rendez-Vous | Ref. Q1358420 | SKU: MC-CUST-Q1358420-W361
Precious Metal Alloy & XRF Purity904L 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 SpecPrecision 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 CalibreJaeger-LeCoultre Manufacture Cal. 925 / Cal. 899 — Swiss Super Clone Mechanical Calibre Regulated to +0.5 s/d, 297 deg
Power Reserve & Oscillation Frequency72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel
Double AR Sapphire Crystal & Water ResistanceScratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 50m / 5 ATM
Dial Finishing & Hallmarked Bracelet Clasp39.0 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).

REFERENCE-SPECIFIC COLLECTOR Q&A
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 • REF. Q1358420 68.8g VERIFIED

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

PRIVATE CLIENT ALLOCATION
$2,200 USDT
Secondary Market Estimate: $18,500
LIVE SWISS ASSAY TELEMETRY • BENCH #04 4K QC VIDEO READY
METTLER-TOLEDO
68.8g
1:1 Exact Mass
FISCHER XRF
Ti5 / CNC
5-Axis Swiss Grade
WITSCHI X1
+0.4 s/d
296° • 0.0 ms
Includes personalized 4K scale & XRF video on WhatsApp before dispatch ▶ Sample QC
Request 4K QC Video
✓ Confidential Private Client Escrow, Bank Wire & Direct Digital Settlement
✓ 4K Mettler-Toledo scale & 5-axis CNC tolerance video approval before dispatch
✓ Insured DHL Express / Ferrari Group armored delivery
COMPLEMENTARY ALLOCATIONS

More from the Monte-Carlo Showroom

Jaeger-LeCoultre Ref. Q1358420 • 68.8g
$2,200 USDT
● Added to Private Selection Portfolio
Private Client Concierge Desk

Allocation Portfolio (0)

Pre-Shipment 4K Scale & Timing Video Included Insured Vault Delivery
Verified Reference Mass 0.0g Verified
Total Private Allocation $0
Includes Personalized 4K Mettler-Toledo Scale & Witschi Timegrapher Dossier
All removed bracelet links accompany your timepiece inside the presentation box • Insured Brink's / DHL Express Priority
PRIVATE CLIENT DESK
Geneva • Monte-Carlo • Place Vendôme

Private Allocation & 4K QC Dossier

1. Select Preferred Settlement Arrangement:
Allocation Dossier Reference
ALLOC-2026-884920
Total Allocation Value
$26,900 USD
Pre-Shipment 4K Laboratory Verification Protocol: Before any funds are finalized or your timepiece is dispatched, our Senior Watchmaker records a personalized 4K video of your exact serial number on a calibrated Mettler-Toledo gram scale and Witschi Chronoscope timegrapher.
GRAVIMETRIC & HOROLOGICAL SPECIFICATION MATRIX

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