The four chapters of Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185

The Reverso Hybris Mechanica Calibre 185 is the result of over six years of development, combining key areas of savoir-faire at Jaeger-LeCoultre with innovative new astronomical indications. It is the world’s first wristwatch with four functioning display faces.

By incorporating three displays of lunar information on the interior face of the iconic Reverso cradle (the synodic cycle, the draconic cycle and the anomalistic cycle), the Hybris Mechanica Quadriptyque can predict the next global incidence of astronomical events such as supermoons and eclipses — the world’s first wristwatch to provide such a deep reading of the cosmos.

With 188 years of relentless innovation and savoir-faire behind it, Jaeger-LeCoultre continually sets new boundaries in the domain of fine mechanical watchmaking. Its Hybris Mechanica series of ground-breaking, ultra-complicated timepieces has established a constellation of stars shining with unparalleled brilliance in the horological heavens.

In 2021, the latest addition to this celestial assemblage is a grand oeuvre six years in the making — the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 Quadriptyque, the first watch in the world with four faces of timekeeping indications.

Since the advent of personal timepieces, the quest to build increasingly complicated watches is constrained by the volume of space available to the watchmaker. Having a multitude of complications in a watch is pointless unless they can be legibly and comprehensibly displayed, and the watch can be reasonably worn.

Liberated by the unique design of the iconic Reverso, Jaeger-LeCoultre has created a world’s first: a double-faced case continuously driven by the in-house Calibre 185, and a double-faced cradle with indications synced and updated by the primary movement every day at the stroke of midnight by an ingenious mechanical system proprietary to Jaeger-LeCoultre.

If executed through conventional mechanical means, the 11 complications of the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 Quadriptyque would result in a timepiece far more suited for a desk than a wrist.

Thanks to nearly two centuries of expertise and a thoroughly modern approach to innovation, Jaeger-LeCoultre tells the story of cosmic and terrestrial time within the confines of a 51mm by 31mm by 15mm case, a story told in four chapters of horological virtuosity.

The secret to the Reverso Hybris Mechanica Quadriptyque’s four functioning display faces lies in a solution first used in the 2006 Reverso Hybris Mechanca Grande Complication à Triptyque. Every day at midnight, a pin extends out of the main case movement to activate a mechanical corrector in the cradle, which then advances the cradle displays.

The mechanism driving the cradle displays is set directly into the cradle itself, without any additional movement plates that would increase the thickness of the watch. Jaeger-LeCoultre’s expertise in ultra-compact watchmaking makes the Quadriptyque, despite its multiple indications and complications, one of the most wearable high-complication watches of our time.

The Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 comes in an exceptional presentation box with a built-in mechanism that allows the wearer to quickly and intuitively set all the calendar and astronomical displays of the watch after a period of being unworn.

A two-position crown on the side of the box is used to first set the number of days that have elapsed since the watch was last worn. With the Quadriptyque set within the correction support frame, the box corrector crown can then be extended to its second position and wound to rapidly bring the watch to the current date for all calendar and astronomical indications. There is no risk of overcorrecting the watch or damaging the movement, since the entire process is controlled by the box corrector mechanism.

With the Reverso Hybris Mechanica Calibre 185 Quadriptyque, Jaeger-LeCoultre reasserts its position at the apogee of mechanical watchmaking and reaffirms its dedication to expanding the boundaries of horological knowledge.