Jaeger-LeCoultre Master Ultra Thin Réserve de Marche 1378420 39mm Silver Dial Black Leather
Craftsmanship & Technical Specifications
Watch Specifications & Build Details
Engineered by Verified 1:1 Factory for collectors who care as much about what’s under the caseback as what’s on the dial, the Jaeger-LeCoultre Master Ultra Thin Réserve de Marche 1378420 39mm Silver Dial Black Leather pairs a Solid 316L Stainless Steel (Satin & Mirror Finished) exterior (39MM (1:1 Factory Dimensions)) with the cloned 1:1 Cloned Swiss Automatic Calibre (28,800 vph) movement (48–70 Hour Power Reserve).
Metallurgy, Crystal Clarity & Wrist Balance
The winding stem engages with a firm, positive click across every setting position, and the hands advance with zero backlash. Sealed behind a scratch-resistant sapphire crystal and triple-checked gaskets, it’s built for daily wrist rotation rather than sitting in a display box.
Pre-Shipment Studio Inspection & 3-Year Warranty
We never ship blind from a warehouse shelf. Within 48 hours of ordering the Jaeger-LeCoultre Master Ultra Thin Réserve de Marche 1378420 39mm Silver Dial Black Leather (Ref. SW-32562), our watchmakers film your watch running live on the timegrapher and pressure tester so you can verify dial alignment, amplitude, and beat error firsthand. Once approved, it dispatches via customs-cleared express courier with a 3-year mechanical warranty.
Best Replica Watch Factories Ranked: Clean Factory vs VSF vs 3KF vs APSF (2026)
Explore our factory comparison guide covering Clean Factory, VSF, 3KF, APSF, and ZF to compare movement calibres, case finishing, and QC standards.
Read Complete Technical ComparisonEvery timepiece at SwissClone undergoes a 48-hour timegrapher inspection and waterproof pressure test before insured worldwide dispatch. Explore related collections and matching references below:
Technical Specifications Matrix
| Manufacture & Reference | Jaeger-LeCoultre Master Ultra Thin Réserve de Marche 1378420 39mm Silver Dial Black Leather |
|---|---|
| Factory | APS Factory (1:1 Best Edition) |
| Movement Architecture | 1:1 Swiss Super Clone Automatic Movement (28,800 vph Smooth Sweep) |
| Case Metallurgy | Solid 316L Stainless Steel (Exact 1:1 Weight & Finish) |
| Crystal & Lens | Double AR Coated Scratchproof Sapphire |
| Water Resistance | Vacuum Pressure Tested to 50m (5 ATM) |
| Luminescence | Polished Applied Dial Markers & Hands |
| Warranty | 3-Year Mechanism Warranty + Post-Payment QC |