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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteJaeger-LeCoultre introduced the Duometre Chronograph Moon on 9 April 2024, pairing a new manually wound movement, Calibre 391, with a mono-pusher chronograph and astronomical displays. Its defining idea is the Duometre architecture: separate gear trains serve timekeeping and complications while sharing one regulating organ. That is the manufacturer’s design rationale, not an independent accuracy result. The watch is listed in platinum and pink gold; Jaeger-LeCoultre shows the price as available upon request.
What makes the Duometre Chronograph Moon mechanically distinctive?
The Duometre principle separates the movement’s power supply for timekeeping from the power supply for its complications. Jaeger-LeCoultre says the patented mechanism, introduced in 2007, uses two barrels and two separate gear trains linked to a single regulating organ. One train serves the time indications and the other the complications. The brand’s stated aim is to prevent complication operation from compromising timekeeping; that rationale should not be read as a verified accuracy advantage for this watch. Jaeger-LeCoultre describes the architecture on its official product page.
The 2024 watch is built around Calibre 391, an in-house, manually wound movement identified by the maker as reference 391AA. The following are Jaeger-LeCoultre’s published specifications, rather than independent measurements:
| Calibre 391 specification | Published value |
|---|---|
| Components | 482 |
| Jewels | 47 |
| Movement diameter | 33.7 mm |
| Movement thickness | 8.24 mm |
| Frequency | 21,600 vibrations per hour (3 Hz) |
| Power reserve | 50 hours |
The functions combine hours and minutes, seconds, a mono-pusher chronograph, moon phase, day/night indication, two power-reserve indications and foudroyante seconds. A single pusher starts, stops and resets the chronograph, according to the pink-gold model description. No independent timing test is established here, so the published movement details do not support a claim about measured real-world accuracy.
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- Multi functions: 12H/24H time, calendar with day and date, alarm, chronograph, 50m water resistant, LED back light, shock resistant, these functions make this sport wrist watch suitable for all kinds of indoor and outdoor sports use
- Water resistance: 5 ATM (164 Ft / 50M) waterproof, support hands washing, raining, swimming, boating. NOTE: Please DO NOT press any buttons under water and stay it away from hot water
How to read the chronograph and astronomical displays
The dial arranges the complications across distinct counters rather than presenting them as one combined scale:
- At 3 o’clock: the chronograph hours-and-minutes counter also contains the moon-phase display.
- At 9 o’clock: the time subdial includes the day/night indication.
- At 6 o’clock: the foudroyante seconds display sits between the two power-reserve indications.
Foudroyante seconds, sometimes called jumping seconds, make one rotation in a second and beat six times during that interval. The Fondation de la Haute Horlogerie explains that this lets the wearer read in sixths of a second. It describes the display’s indicated increment; it is not a certification of the complete watch’s timing performance. Read the Fondation de la Haute Horlogerie’s explanation of the foudroyante display.
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Jaeger-LeCoultre describes the dial as opaline, with azuré, slightly recessed counters and a curved edge that follows the box-shaped crystal. These details give the multiple indications separate visual fields while keeping the moon phase within the chronograph counter.
Platinum or pink gold: what changes?
The official listings document two material variants. They share the Calibre 391 family and the core function set; the published information does not establish a difference in movement performance. Check the relevant regional product page for its precise dial, strap and configuration details.
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| Reference | Case material | Published case details |
|---|---|---|
| Q622656J | Platinum 950/1000 | 42.5 mm diameter, 14.2 mm thick, 5 bar water resistance |
| Q622252J | 18-carat pink gold (750/1000) | 42.5 mm diameter, 14.2 mm thick, 5 bar water resistance |
These are the figures shown on Jaeger-LeCoultre’s regional official product listings, not a guarantee that every market page or configuration will display identical details. The platinum listing specifies an alligator strap with quick-release technology and a 21 mm lug width. That width alone does not establish that any third-party 21 mm strap will fit: check the attachment and exact reference before buying a replacement.
How much does the Duometre Chronograph Moon cost?
Jaeger-LeCoultre’s product pages state “Price available upon request”; they do not establish a numeric current retail price. The listings also do not confirm live stock in a particular city or country. For a current quote, taxes, delivery terms and availability, contact Jaeger-LeCoultre or a local boutique directly rather than relying on a historical launch figure or a secondary-market asking price. The company’s platinum listing and pink-gold listing provide boutique contact options.
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When was it introduced?
Jaeger-LeCoultre announced the Duometre Chronograph Moon on 9 April 2024, presenting it with the new Calibre 391. The launch formed part of broader new expressions for the Duometre collection, alongside the Heliotourbillon Perpetual. It is a 2024 introduction, not a 2026 launch. The brand’s newsroom announcement is dated 9 April 2024. For the mechanism’s history, see Jaeger-LeCoultre’s Duometre collection history.
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