Jaeger-LeCoultre revisits its record-thin chiming tourbillon with the Master Hybris Mechanica Ultra Thin Minute Repeater Tourbillon. The open-worked pink gold watch measures 41.4 mm across and 8.25 mm thick, built around Calibre 362 – a fully integrated automatic minute repeater tourbillon only 5 mm high and still the thinnest of its kind. Seven patents underpin the design, six developed for the calibre’s 2014 debut. It is a serious piece, but it wears like a quiet thought.
Integration is the theme. The repeater is not stacked on a base movement but formed within it, its re-engineered racks, hammers and gongs occupying minimal vertical space. A one-minute flying tourbillon of 59 components and 0.248 grams removes the upper bridge to save height and add air. Winding is handled by a peripheral rotor that circles the movement on 36 ceramic ball bearings – efficient, invisible, and mercifully thin.
Sound is treated with equal care. One-piece square-profile gongs aim for tonal purity, struck by articulated trebuchet hammers for speed and control. A patented silent time-lapse reduction mechanism trims awkward pauses between chimes, especially when no quarters are sounded, keeping the cadence fluid. The result seeks power and refinement rather than volume alone – a salon recital, not a street parade.
The architecture favors transparency. Three structural bridges are made of sapphire crystal, with 18K pink gold chatons securing 11 rubies where direct setting was not feasible. Finishing is exhaustive across 593 components, with 14 decorative techniques including côtes de Genève, perlage, straight and circular brushing, sunray brushing, snailing, sandblasting, polishing, flat polishing, diamond polishing, linear brushing, bevelling, guillochage, and 48 inner angles. The dial becomes an open-worked 18K white gold ring framing the calibre and the guilloché pink gold winding rotor crafted in the Métiers Rares ateliers.
The 60-part case adapts Master Grande Tradition codes and replaces a classic slide with a patented system: a retractable pusher at 10 o’clock to engage the repeater and a second pusher at 8 o’clock to lock and release it. Assembly of the movement alone takes seven weeks. Recommended retail price is 765,000 EUR in Germany and 770,000 EUR in Austria. Excess is absent here – the watch focuses on structure, sound, and light.
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