The Basics
Pure lines and a perfectly balanced dial create a beautiful stage-setting for one of the most emblematic mechanical complications. Two classic complications – a power-reserve indication and a pointer-type date display – are elegantly associated in this model: A sapphire crystal caseback reveals its automatic Calibre 938.
| Brand: | Jaeger-LeCoultre |
| Family: | Master |
| Reference: | 1378420 (aka: Q1378420) |
| Name: | Master Ultra Thin Réserve de Marche Stainless Steel / Silver |
| Produced: | N/A |
| Limited: | No |
Below is a detailed look at Jaeger-LeCoultre’s model 1378420 from Master watch family, including the price, case details and movement features.
The Details
Jaeger-LeCoultre’s Master Ultra Thin Réserve de Marche Stainless Steel / Silver (1378420 (aka: Q1378420)) was originally released in N/A. This watch features a automatic movement beating at a frequency of 28800 bph ( 4 Hz) to provide a 40-hour power reserve when fully wound.
The Case
The stainless steel case measures 39mm in diameter and roughly 9.9mm thick. The round case is paired with a silver color dial with dauphine-shaped hands, and a stick / dot hour markers and minute track, covered by a sapphire glass. Jaeger-LeCoultre’s Master model 1378420 is water resistant up to 50 meters (164 ft). A display caseback is over the back of the watch case.
| Material: | Stainless steel |
| Glass: | Sapphire |
| Back: | Display |
| Shape: | Round |
| Diameter: | 39mm |
| Height: | 9.9mm |
| Lug Width: | N/Amm |
| W/R: | 50 |
Case Diameter
Case Thickness
Lug Width
Water Resistance
The Movement
The Master 1378420 movement is a powered by caliber 938 made by Jaeger-LeCoultre. The 41-jewel automatic movement is mm in diameter. Its balance wheel oscillates at 28,800 semi-oscillations per hour or 4 Hz. This movement offers a 40-hour power reserve.
| Type: | Automatic |
| Brand: | Jaeger-LeCoultre |
| Caliber: | 938 |
| Base: | N/A |
| Display: | Analog |
| Diameter: | mm |
| Jewels: | 41 |
| Reserve: | 40 hours |
| Frequency: | 28800 bph |
| Time: | Hours, Minutes, Small Seconds |
| Chronograph: | |
| Additionals: | Power Reserve Indicator |
The Price
How much does the Jaeger-LeCoultre’s Master 1378420 cost? This watch was introduced in N/A and has been in Jaeger-LeCoultre’s collection for around . This watch is not a limited release. As with most luxury watches, the price of depends on the availability and demand.
CURRENT PRICE: $8,750
For more information, visit Jaeger-LeCoultre online.
Specifications:
- Brand: Jaeger-LeCoultre
- Model: Master Ultra Thin Réserve de Marche Stainless Steel / Silver
- Reference Number: 1378420 (aka: Q1378420)
- Limited: No
Case & Dial:
- Material: Stainless steel
- Glass: Sapphire
- Back: Display
- Diameter: 39
- Thickness: 9.9
- Lug Width: N/A
- Dial Color: Silver
- Indexes: Stick / Dot and Dauphine-shaped hands
- Water Resistance: 50 meters
Movement:
- Winding: Automatic
- Brand: Jaeger-LeCoultre
- Caliber: 938
- Display: Analog
- Diameter: mm
- Jewels: 41
- Power Reserve: 40 hours
- Frequency: 28800 bph
- Functions: Hours, Minutes, Small Seconds
About Jaeger-LeCoultre
Antoine LeCoultre established his watchmaking workshop in 1833. LeCoultre was a horological inventor, having developed the pinion cutting machine, and a measuring device accurate to one micron. In 1903, a watchmaker named Edmond Jaeger challenged the Swiss manufactures to mass-produce an ultra-thin movement that he had invented. LeCoultre accepted and completed the challenge. This led to a partnership between the two watchmakers, laying the foundation for the company known today as Jaeger-LeCoultre. Jaeger-LeCoultre is part of the Richemont group.
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