Q4128421
- Model
- Master Control Geographic
- Case material
- Stainless Steel
- Case size
- 40mm
- Movement
- Automatic
- Calibre
- 939
- Dial colours
- Silver / White
- Market value band
- $6k – $45k
Q4128421 is a Jaeger-LeCoultre Master Control Geographic reference.
The case is 40mm stainless steel.
It runs the 939, an automatic movement.
Catalogued dial colour: silver / white.
2026-08-24 re-verify: re-fetched this exact URL; MOVEMENT accordion now exposes full content. Case 40 x 10.96mm; silvered grey sunray-brushed dial with polished rhodium-finish numerals and hour-markers. Caliber 939, movement thickness 4.9mm, 28800vph, power reserve 70 hours; functions hour-minute/seconds/pointer-date/power-reserve/2nd-time-zone via 24-city disc.
Before you ask.
What movement does the Jaeger-LeCoultre Q4128421 use?
The Jaeger-LeCoultre Q4128421 runs the 939, an automatic movement.
How do I check a Jaeger-LeCoultre Q4128421 with Watch Safe?
Look up the watch's serial number in the Watch Safe registry to see whether a record exists or a theft flag is attached. A registry search identifies records for a specific serial; it does not authenticate the watch. Authentication is performed in person by an independent expert authenticator, and Watch Safe records and publishes the result.
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