Jaeger-LeCoultre
Jaeger-LeCoultre Master Control Calendar Q4148120
The Jaeger-LeCoultre Master Control Calendar (reference Q4148120) is a 40 mm stainless steel watch with a silver dial. It runs on the automatic caliber 866AA with a 70-hour power reserve and is water resistant to 50 m. It was introduced in 2020 and is still in production.
Specifications
Case
- Reference
- Q4148120
- Collection
- Master Control
- Case size
- 40 mm
- Thickness
- 10.95 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 50 m
- Bracelet / strap
- Stainless steel bracelet
Dial and bezel
- Dial
- Silver
Movement
- Movement
- Automatic
- Caliber
- 866AA
- Power reserve
- 70 hours
- Frequency
- 28,800 vph
- Functions
- Day-date, Moon phase, Small seconds
Production
- Production
- 2020 – today (current)
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 |
|---|---|---|---|---|---|
| Q4148120 (This watch) | 40 mm | Stainless steel | Silver | 866AA | 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– |
| Q4148480 | 40 mm | Stainless steel | Blue | 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 Calendar Q4148120?
- The Jaeger-LeCoultre Master Control Calendar Q4148120 has a 40 mm case, 10.95 mm thick.
- What movement does the Jaeger-LeCoultre Master Control Calendar Q4148120 use?
- It uses the automatic caliber 866AA, with a 70-hour power reserve.
- How water resistant is the Jaeger-LeCoultre Master Control Calendar Q4148120?
- It is water resistant to 50 metres.
- Is the Jaeger-LeCoultre Master Control Calendar Q4148120 still in production?
- Yes, it is a current reference.
- When did the Jaeger-LeCoultre Master Control Calendar Q4148120 come out?
- It was introduced in 2020.
- What is the Jaeger-LeCoultre Master Control Calendar Q4148120 made of?
- The case is stainless steel. Bracelet or strap: Stainless steel bracelet.
Catalog facts checked September 2026.