Jaeger-LeCoultre’s 2025 Master Hybris Artistica Calibre 945, reference Q5262480, pairs a midnight-blue Grand Feu enamel dome and golden-coloured filigree with a sidereal-time Cosmotourbillon and a minute repeater. The pink-gold watch was announced as a five-piece limited edition. “Calibre 945” also names other interpretations, so the specifications below apply specifically to Q5262480.
What is the 2025 Master Hybris Artistica Calibre 945?
Announced by Jaeger-LeCoultre on 9 October 2025, Q5262480 is a manually wound watch built around the Manufacture Calibre 945. Its indications combine conventional timekeeping with astronomical display: hours and minutes, a 24-hour indication, a Cosmotourbillon showing sidereal time, a real-time Northern Hemisphere constellation chart and a minute repeater. Jaeger-LeCoultre’s 2025 release describes the dial as a triple-level dome, with a midnight-blue enamel dome and golden-coloured filigree structure. The brand says its Atomium motif evokes 117 interconnected spheres.
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What does the Cosmotourbillon show?
The flying Cosmotourbillon circles the dial anti-clockwise once per sidereal day, displaying the passage of time against the fixed stars. Jaeger-LeCoultre gives that interval as 23 hours, 56 minutes and 4 seconds. A sidereal day is shorter than the 24-hour solar day used for civil time. The maker explains the distinction this way: “Lasting 23 hours, 56 minutes and 4 seconds, a sidereal day is defined by Earth’s rotation measured in relation to fixed stars, whereas the 24-hour solar day (used for civil time) is measured by Earth’s orbit around the Sun.” Jaeger-LeCoultre’s technical explanation also says the rotating celestial disc tracks Northern Hemisphere constellations in real time as seen from Switzerland’s Vallée de Joux. A calendar complication lets the constellation position be set, while a separate sun-shaped pointer completes a 24-hour revolution to indicate 24-hour time.
How does the minute repeater work?
A minute repeater is an acoustic complication: on activation, it strikes the hours, quarters and minutes, rather than serving as a decorative sound effect. Jaeger-LeCoultre identifies cathedral crystal gongs fixed to the rear sapphire crystal, trébuchet hammers and a silent governor among the movement’s features. The manufacturer also says the Cosmotourbillon mechanism has 73 components, is held by a lightweight titanium carriage and uses ceramic ball bearings; its 10 mm monometallic balance wheel beats at 4 Hz. These are the brand’s published technical descriptions, not independent test results.
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Q5262480 specifications
| Specification | Jaeger-LeCoultre-published detail |
|---|---|
| Reference and release | Q5262480; announced 9 October 2025 |
| Edition | Five pieces |
| Case | 18K pink gold (750/1000); 45 mm diameter × 16.05 mm thick |
| Crystal and back | Sapphire crystal case-back |
| Movement | Manually wound Manufacture Calibre 945 |
| Functions | Hours and minutes; 24-hour indication; Cosmotourbillon indicating sidereal time; celestial disc and star chart indicating Northern Hemisphere constellations in real time; minute repeater |
| Power reserve | 40 hours |
| Dial | Midnight-blue Grand Feu enamel dome with golden-coloured filigree structure |
| Water resistance | 5 bar |
| Strap and clasp | Blue alligator leather with small-scale alligator lining; pink-gold adjustable folding clasp |
The figures and materials in this table are the manufacturer’s published specifications for Q5262480; they are not measurements from an independent inspection or test. The cited release gives no price or current stock information.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How Q5262480 fits the Calibre 945 family
Calibre 945 was originally created in 2010, according to Jaeger-LeCoultre. The name covers multiple interpretations, not just the 2025 blue-dial Q5262480. The manufacturer archive records pink-gold Galaxia and white-gold Atomium interpretations introduced on 30 March 2022. In September 2026, Jaeger-LeCoultre announced two further interpretations at its Shanghai exhibition, but that announcement does not identify their references, materials, dial designs, edition sizes or technical specifications. Those details should not be inferred from Q5262480.
| Interpretation | Release information | What is established |
|---|---|---|
| Q5262480 | 9 October 2025 | Pink-gold case, midnight-blue enamel and golden-coloured filigree; five-piece edition; detailed specifications published by Jaeger-LeCoultre (2025 release) |
| Galaxia and Atomium interpretations | 30 March 2022 | Manufacturer archive lists pink-gold Galaxia and white-gold Atomium versions (Jaeger-LeCoultre collection archive) |
| Two new interpretations | September 2026 | The exhibition announcement confirms two global launches but does not state references, materials, dial treatments, prices, edition sizes or technical specifications (Shanghai exhibition announcement) |
Price and availability
The cited official release states neither a price nor current availability for Q5262480, and does not identify where it can be purchased. Its announced production is limited to five pieces; that edition size alone does not establish whether any are currently available.
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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.
