Jaeger-LeCoultre
Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420
The Jaeger-LeCoultre Master Control Chronograph Calendar (reference Q4138420) is a 40 mm stainless steel watch with a silver sunburst dial. It runs on the automatic caliber 759 with a 65-hour power reserve and is water resistant to 50 m. It was introduced in 2020.
Specifications
Case
- Reference
- Q4138420
- Collection
- Master Control
- Case size
- 40 mm
- Thickness
- 12.05 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 50 m
- Bracelet / strap
- Novonappa calf leather strap
Dial and bezel
- Dial
- Silver sunburst
Movement
- Movement
- Automatic
- Caliber
- 759
- Power reserve
- 65 hours
- Frequency
- 28,800 vph
- Functions
- Chronograph, Day-date, Moon phase
Production
- Production
- 2020 – today (discontinued)
How it compares within the Master Control family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| Q4138420 (This watch) | 40 mm | Stainless steel | Silver sunburst | 759 | 2020– |
| Q4018420 | 40 mm | Stainless steel | Silver sunburst | 899AC | 2020– |
| Q4118420 | 40 mm | Stainless steel | Silver | 956AA | 2020– |
| Q4138180 | 40 mm | Stainless steel | Blue | 759 | 2020– |
| Q4138480 | 40 mm | Stainless steel | Blue | 759 | 2020– |
| Q4148120 | 40 mm | Stainless steel | Silver | 866AA | 2020– |
| Q4158120 | 38 mm | Stainless steel | Grey-blue gradient | 899 | 2026– |
| Q4168120 | — | Stainless steel | Grey-blue gradient | — | 2026– |
| Q4178180 | — | Stainless steel | Grey-blue gradient | — | 2026– |
About the Master Control family
The Master Control was introduced in 1992, when Jaeger-LeCoultre began testing each watch for 1,000 hours before it left the manufacture, a test that gave the line its name. It is a classic round watch with a simple dial and a sector-style layout on some versions.
The catalog includes time-and-date models with caliber 899, chronographs with caliber 759, calendar and geographic models, in stainless steel and pink gold. Dealers identify the function and generation from the reference and check the strap or bracelet and the papers.
Quick answers
- What size is the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420?
- The Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420 has a 40 mm case, 12.05 mm thick.
- What movement does the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420 use?
- It uses the automatic caliber 759, with a 65-hour power reserve.
- How water resistant is the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420?
- It is water resistant to 50 metres.
- Is the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420 still in production?
- Discontinued.
- When did the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420 come out?
- It was introduced in 2020.
- What is the Jaeger-LeCoultre Master Control Chronograph Calendar Q4138420 made of?
- The case is stainless steel. Bracelet or strap: Novonappa calf leather strap.
Catalog facts checked September 2026.