Jaeger-LeCoultre Master Ultra Thin Master Ultra Thin Réserve de Marche Stainless Steel / Silver / Alligator
Reference 1378420
About this watch
The Jaeger-LeCoultre Master Ultra Thin Réserve de Marche is a masterpiece of horological art, showcasing precision and elegance in its round 39mm case with a height of just 9.9mm. The stainless steel case exudes a sophisticated shine, while the sunburst finish on the silver dial adds depth and character. A gem-set bezel adds a touch of extravagance without overpowering the simplicity of the design. The Jaeger-LeCoultre caliber 938 mechanical automatic winding movement is a marvel of engineering, boasting 273 parts and 41 jewels, with a frequency of 28,800 vibrations per hour. This watch provides a wealth of information with indications for hours, minutes, small seconds, date, and power reserve indicator. Its slim profile and lightweight feel make it comfortable for all-day use. With a water resistance of up to 50 meters, you can wear it confidently while washing your hands or caught in the rain.
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Key Features
- 39mm round stainless steel case
- 9.9mm height for ultimate wearability
- Jaeger-LeCoultre caliber 938 mechanical automatic winding movement
- Sapphire glass for scratch resistance
- 43-hour power reserve indicator
- Water resistance up to 50 meters
- Gem-set bezel for a touch of luxury
Specifications
- Brand
- Jaeger-LeCoultre
- Family
- Master Ultra Thin
- Model
- Master Ultra Thin Réserve de Marche Stainless Steel / Silver / Alligator
- Reference
- 1378420
- Movement
- 938
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date
- Power Reserve Indicator
- Case
- Stainless Steel 39mm
- Dial Color
- Silver
- Crystal
- Sapphire
- Water Resistance
- 50
Current Listings
Jager LeCoultre Q1378420 Master Reserve de Marche
Jager LeCoultre Master Reserve de Marche, a stainless steel watch with automatic movement and power reserve indicator.
- Condition: Excellent
- Case Size: 39mm diameter
- Thickness: 10mm
- Water Resistance: 100ft
![[WTS] JLC Master Ultra Thin Moon - 2025 Like New Full Set - $8,100](https://preview.redd.it/b52rbd6yt9kf1.jpg?width=640&crop=smart&auto=webp&s=890d99ad581060d6914ad991bbe2ab00fdf7e729)
JLC Master Ultra Thin Moon - 2025 Like New Full Set - $8,100
This Jaeger-LeCoultre Master Ultra Thin Moon is a 39mm watch that was purchased in April 2025. It has been worn only a handful of times and shows no signs of scratches or damage.
- Condition: Like new
- Year Of Purchase: 2025
- Case Diameter: 39mm
![[WTS] Jaeger-LeCoultre Master Ultra Thin](https://preview.redd.it/nq7iymynjzjf1.jpg?width=640&crop=smart&auto=webp&s=820bed7eb5ed3e73e522cd97d69fbca3e89423ad)
Jaeger Lecoultre Master Ultra Thin Q1278420
The Jaeger Lecoultre Master Ultra Thin features an updated 22k gold rotor and comes with a full kit, including box, warranty card, original strap/buckle, and serve record from JLC.
- Condition: pristine
- Shipping cost (usa): $50
![[WTS] Jaeger Lecoultre Master Ultra Thin Q1278420 (Full Set)](https://preview.redd.it/qsi0lbmke9jf1.jpg?width=640&crop=smart&auto=webp&s=9d81972d3d0a2d18d5751999d056d56a1b734374)
BNIB Jaeger-LeCoultre MASTER ULTRA THIN MOON STAINLESS STEEL 2025 FULL SET
A Jaeger-LeCoultre Master Ultra Thin Moonphase watch in stainless steel with a silver dial, featuring a 39mm case and a black alligator leather strap. The watch is complete with its original packaging and comes under an 8-year factory warranty.
- Condition: Brand New In Box (BNIB)
- Case size: 39mm
- Material: stainless steel
- Strap material: black alligator leather
BNIB Jaeger-LeCoultre MASTER ULTRA THIN DATE BLUE DIAL Q1238480 2025 FULL SET
This is a brand new Jaeger-LeCoultre Master Ultra Thin Date with a blue dial and 39mm stainless steel case, on a black alligator leather strap.
- Condition: Brand new in box (BNIB)
- Case size: 39mm
- Material: stainless steel
2023 JLC Moonphase Master Ultra Thin
The Jaeger-LeCoultre Master Ultra Thin Moon combines a refined, minimalist design with the sophisticated complication of a moon phase indicator in a sleek, ultra-thin case that measures just 9.3mm thin.
- Condition: Excellent Unworn Condition
- Case Material: Stainless steel
- Dial Color: Silver-Grey
- Movement Type: Automatic
2015 Jaeger-LeCoultre Master Ultra Thin Moon 39mm Q1362520 Beige Dial
2015 Jaeger-LeCoultre Master Ultra Thin Moon Phase watch features a pink gold case with an eggshell beige dial, and includes functions such as hour, minute, seconds, date, and moon phase. The watch is equipped with an adjustable brown alligator leather strap and comes with a watch box.
- Condition: Excellent overall condition
- Dial color: Eggshell beige
- Strap material: Brown Alligator Leather
- Buckle type: Pin buckle