Jaeger-LeCoultre Master Hybris Artistica Calibre 945

Jaeger-LeCoultre’s newest release under the Hybris Artistica banner is anything but restrained. The Master Grande Hybris Artistica Calibre 945 brings back one of the maison’s most ambitious movements, first introduced in 2010, and dresses it in a visually stunning case and dial inspired by cosmic order and sidereal time. Fitted with the Calibre 945, this celestial masterpiece houses a minute repeater and a rotating “Cosmotourbillon”, offering both spectacle and technical gravitas. Though limited to just five pieces, its existence affirms Jaeger-LeCoultre’s enduring pursuit of horological excellence.

The Jaeger‑LeCoultre Master Grande Hybris Artistica Calibre 945 is housed in a 45mm case made entirely of 18k pink gold, standing 16.05 mm thick. Constructed from more than 80 individual parts, the case presents a bold, architectural silhouette that merges sculptural complexity with refined hand‑finishing. Alternating polished and satin‑brushed surfaces accentuate its modern geometry, while curved lugs provide a seamless transition to the strap, balancing elegance and power on the wrist.Turning the watch over reveals a breathtaking view of the Calibre 945 through a wide sapphire crystal caseback. The movement is beautifully hand‑finished with Côtes de Genève, anglage, and polished screw heads, displaying the meticulous craftsmanship for which Jaeger‑LeCoultre’s Vallée de Joux workshop is renowned. The transparent back also enhances the acoustic resonance of the minute‑repeater mechanism, allowing the gongs’ sound to radiate freely.A finely fluted pink‑gold crown sits at 3 o’clock for winding and setting, complemented by a minute‑repeater slide discreetly integrated along the left caseband. A sapphire crystal with anti‑reflective coating safeguards the intricate dial and ensures perfect legibility from every angle. Water‑resistance can reach up to 50 meters (165 feet), a remarkable achievement for a chiming complication of this complexity.The dial’s composition is highly dimensional and conceptually rich, built around a golden “Atomium” lattice structure consisting of 117 connected spheres. This geometric pattern is more than decorative; it echoes astronomical constellations as seen above Jaeger-LeCoultre’s home in the Vallée de Joux, with the arrangement rotating in real time to match the stars’ sidereal motion. Hours and minutes are subtly displayed around the periphery, allowing the celestial disc and rotating Cosmotourbillon to dominate the central field. The dial balances kinetic energy with symbolic meaning, emphasizing Jaeger-LeCoultre’s dual mastery of mechanics and storytelling.Beneath the Atomium structure, a flying tourbillon performs dual rotations, spinning on its axis while completing a full revolution around the dial every 23 hours, 56 minutes, and 4 seconds, which constitutes a sidereal day. This display of orbital accuracy anchors the poetic theme of cosmic movement embedded throughout the piece.

The “Jaeger-LeCoultre Master Hybris Artistica Calibre 945” (Ref#: N/A) is powered by the in-house manually wound mechanical movement, calibre 945 with 53 jewels and a high frequency of 28,800 vph (4 Hz). It integrates a minute repeater mechanism, a sidereal-time rotating tourbillon, and refined astronomical tracking. The minute repeater chimes hours, quarters, and minutes on demand, using cathedral gongs and a silent governor for refined acoustic performance. Power reserve can last up to 40 hours, when fully wound. Mounted on a hand-stitched black alligator leather strap, the watch is secured with a pink gold folding clasp that matches the case. While its size and artistic profile suggest a ceremonial timepiece rather than a daily wearer, it remains surprisingly balanced on the wrist thanks to the lightweight nature of the hollow gold case and thoughtful lug geometry.
Only five pieces of the Master Grande Hybris Artistica Calibre 945 will be made, each a rare tribute to astronomical timekeeping and artistic watchmaking. Its exclusivity, complexity, and celestial inspiration position it among the most prestigious horological creations of 2025. For more up-to-date information visit the official Jaeger-LeCoultre website here.