Jaeger-LeCoultre Master Hybris Mechanica Ultra Thin Minute Repeater Tourbillon

Introduction

In 2014, Jaeger-LeCoultre unveiled the Calibre 362, a movement that stunned the horological world as the slimmest automatic minute repeater with a tourbillon regulator. For 2026, the brand revisits this high-complication masterpiece with the new Master Hybris Mechanica Ultra Thin Minute Repeater Tourbillon. This ten-piece limited edition features an openworked dial and sapphire bridges, reaffirming the Maison's dominance in chiming mechanisms, ultra-thin movements, and precision regulators.

Historical Context

Jaeger-LeCoultre's expertise in ultra-thin movements dates back to 1907 with the record-breaking 1.38 mm-thick Calibre 145. The brand's mastery of tourbillon regulators began in 1946, and since 1870, when it released its first minute repeater, Jaeger-LeCoultre has crafted more than 200 different repeating calibres. The Calibre 362 uniquely integrates all three disciplines into a single, fully integrated movement rather than stacking separate layers for each complication.

Calibre 362: A Marvel of Engineering

With 537 components and a thickness of just 4.7 mm, Jaeger-LeCoultre's patented Calibre 362 is a miracle of space-saving solutions. The striking mechanism occupies only one third of the total volume, with racks, hammers, and gongs housed within the mainplate. The 59-component flying tourbillon is suspended without an upper bridge to reduce structural height, and the rotor is peripheral to preserve the ultra-thin profile while ensuring efficient winding.

The movement is revealed in its entirety, offering a dazzling landscape of technical features. Pushing beyond conventional skeletonisation, which typically opens up existing bridges, Jaeger-LeCoultre uses sapphire bridges to leave nothing to the imagination. Setting the vital 11 ruby jewels into the sapphire proved technically challenging, so pink gold chatons were used instead.

Dial and Case Design

Framing the mechanical scenery is a white gold sandblasted minute ring, followed by an openworked white gold ring with twelve apertures that reveal the peripheral pink gold rotor and its guilloché decoration as it spins around the dial on 36 ceramic ball bearings, delivering energy to the barrel for a 42-hour power reserve. The applied hour markers and dauphine hands are also crafted in pink gold.

The complex 60-part Master Grande Tradition case features an alternative to the conventional slide to activate the minute repeater. Instead, the minute repeater is activated by a redesigned retractable button at 10 o'clock and a second button at 8 o'clock that locks and releases it.

Minute Repeater and Tourbillon

The 187 components of the minute repeater are integrated directly into the calibre and create a clear chime thanks to the square-profile gongs struck by trebuchet-style articulated hammers. Jaeger-LeCoultre's patented silent time-lapse reduction mechanism minimises the pause between the hour and minute chimes, providing a fluid, uninterrupted acoustic sequence.

With no bridge to block the view, the transparency of the flying tourbillon is enhanced by a cutaway in the base plate, revealing its patented, fully exposed S-shaped hairspring.

Finishing and Craftsmanship

Fourteen finishes adorn the calibre, including sandblasting, perlage, Côtes de Genève, and guillochage. The movement features 48 inner angles and 60 hand-bevelled components, requiring seven weeks of assembly. This level of finishing underscores the Maison's commitment to haute horlogerie.

Technical Specifications

• Case: 41.4 mm x 8.25 mm thickness – 18k pink gold, 60-part Master Grande Tradition case, polished and brushed, retractable button pushers at 10 and 8 o'clock, 30m water resistance
• Dial: Openworked, transparent sapphire crystal bridges, flying tourbillon at 6 o'clock, pink gold dauphine hands, sandblasted white gold minutes track, external track with openworked slots revealing the 18k pink gold peripheral rotor with guilloché, applied pink indices
• Movement: JLC Calibre 362 – in-house, automatic, 33.3 mm x 4.7 mm thickness, 18k pink gold peripheral rotor, 537 components, 21,600 vph (3 Hz), 42-hour power reserve, minute repeater, one-minute flying tourbillon with patented S-shaped hairspring, hours and minutes
• Strap: Brown alligator leather, 18k pink gold pin buckle
• Reference: Q13125S2
• Availability: Limited edition of 10 pieces
• Price: To be confirmed

Conclusion

The Jaeger-LeCoultre Master Hybris Mechanica Ultra Thin Minute Repeater Tourbillon represents the pinnacle of watchmaking artistry, combining ultra-thin construction, chiming complexity, and tourbillon precision in a stunning openworked design. As a limited edition of just ten pieces, it is a rare collector's piece that showcases the Maison's technical prowess and aesthetic refinement.