The Jaeger-LeCoultre Duomètre Quantième Lunaire Q604848J is a 2024 steel model with a blue gradient dial, manual-winding movement and a moon-phase display. Its defining feature is the Duomètre architecture: separate gear trains for timekeeping and complications, connected to a shared regulating organ. Jaeger-LeCoultre’s US page displayed a price of US$49,500 excluding taxes on October 7, 2026; pricing varies by region and may change.
What is the Q604848J?
Jaeger-LeCoultre introduced the steel Quantième Lunaire as part of a trio of Duomètre models launched in 2024. The manufacturer describes it as the first Duomètre offered in steel. Fondation de la Haute Horlogerie presents the case as a contemporary interpretation of 19th-century hunter pocket watches and describes its construction as comprising 34 parts. That case-part count is separate from the movement’s 414 components.
The reference is listed as JLQ604848J, also written Q604848J. Its 42.5 mm stainless-steel case houses the hand-wound Calibre 381AA. On the dial, three sub-dials form an inverted pyramid against a gradient blue background with opaline, satin, circular blue and sunray finishes. The case combines polished, brushed and microblasted surfaces, with screwed lugs.
What makes the Duomètre Quantième Lunaire different?
Jaeger-LeCoultre dates its patented Duomètre mechanism to 2007. In the manufacturer’s explanation, two barrels feed separate gear trains: one for timekeeping and one for the complications. The trains are linked to one regulating organ. This is the brand’s description of the movement design, not independent evidence that the watch is more accurate than other watches.
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#1 Best Overall
- Case Size: 40.00 mm, Band Width: 20, Case Thickness: 7.62 mm
- Swiss quartz movement, 316L stainless steel case, Roman dial type, Date/moonphase
- Stainless bracelet, butterfly clasp with push-buttons closure
- Water-resistant up to a pressure of 5 bar (50 m / 165 ft): suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
- 2 Year International Warranty
The display brings together hours, minutes, seconds, date, moon phase, jumping seconds (seconde foudroyante) and two power-reserve indications. Fondation de la Haute Horlogerie places the time display at 3 o’clock, the pointer date and moon phase at 9 o’clock, and the foudroyante seconds at 6 o’clock.
Q604848J specifications
| Specification | Jaeger-LeCoultre Q604848J |
|---|---|
| Case | Stainless steel; 42.5 mm diameter; 13.05 mm thick |
| Movement | Calibre 381AA; manual winding; 42 jewels; 414 components; 33.7 mm diameter |
| Functions | Hours, minutes, seconds, date, moon phase, jumping seconds and two power-reserve indications |
| Frequency | 21,600 vibrations per hour; 3 Hz |
| Power reserve | 50 hours, as stated by Jaeger-LeCoultre |
| Water resistance | 5 bar, as stated by Jaeger-LeCoultre |
| Dial and strap | Blue gradient dial; blue alligator strap with quick-release system; 21 mm lug width |
These are manufacturer specifications, not independently tested measurements. The strap’s quick-release system and 21 mm lug width do not by themselves establish compatibility with every third-party replacement strap.
Rank #2
- 59 teeth gear for 29 ½ Days MoonPhase Display
- BlueGold Stone Dial
- Perlage Movement Polished and Engraving
- Big Date Indicator
- Exhibition Case Back Cover
How much is the Q604848J?
Jaeger-LeCoultre’s US editorial page displayed US$49,500 excluding taxes when accessed on October 7, 2026. A product listing on another regional site gave the price as available upon request. Treat the US figure as a regional display price, not a universal or guaranteed current price; contact Jaeger-LeCoultre to confirm local pricing and availability.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What does Jaeger-LeCoultre’s 1,000 Hour Control mean?
Jaeger-LeCoultre says its watches undergo the in-house 1,000 Hour Control program, including movement tests before and after casing and tests that continue through assembly. The manufacturer describes the program as internal certification testing; it is not an external certification or an independent performance test.
Quick Recap
Best Value
- Tissot Carson Quartz Blue Dial Men's Watch T122.423.16.043.00
Rank #4
- 59 teeth gear for 29 ½ Days MoonPhase Display
- Power Reserve Indicator
- Perlage Movement Polished and Engraving
- Exhibition Case Back Cover
- 12 Months Warranty
Rank #3
- Case Size: 32.00 mm, Band Width: 16, Case Thickness: 7.42 mm
- Swiss quartz movement, 316L stainless steel case, Roman dial type, Date/moonphase
- Stainless steel bracelet, butterfly clasp with push-buttons closure
- Water-resistant up to a pressure of 5 bar (50 m / 165 ft): suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
- 2 Year International Warranty
Sources
- Jaeger-LeCoultre: Duometre Quantieme Lunaire Watch Q604848J — product details, specifications and the manufacturer’s movement and testing descriptions.
- Fondation de la Haute Horlogerie: Jaeger-LeCoultre Duometre Quantième Lunaire Watch — launch context and dial layout.
- Jaeger-LeCoultre: The Pace of Time: Crescent to Crescent — US price display and mechanism overview.
- Jaeger-LeCoultre Press: Duomètre archive — the brand’s Duomètre announcements.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
