Without a doubt, the most impressive timepiece to come out of Watches & Wonders 2021 on day one. The new Jaeger-LeCoultre Hybris Mechanica Calibre 185 is part of JLC’s Hybris Mechanica series of ground-breaking, ultra-complicated timepieces. A watch that took six years in the making, is the first watch in the world with four faces of timekeeping indications. 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.

The world’s first watch with four faces; the most complicated Reverso timepiece ever made that includes a total of 11 complications, including perpetual calendar, minute repeater, flying tourbillon, indications of the synodic, draconic and anomalistic cycles —never before presented together in a wristwatch—, and requiring 12 patents. The four faces show the following indications:

Face 1: Hour-Minute, Tourbillon (indicating the Second), Instantaneous Perpetual Calendar, Grande Date, Day, Month, Leap Year, Night & Day

 Face 2: Jumping Digital Hour, Minute, Minute Repeater

 Face 3: Northern Hemisphere Moon Phase, Draconic Lunar Cycle, Anomalistic Lunar Cycle, Month, Year

 Face 4: Southern Hemisphere Moon Phase

The tourbillon is one of the main protagonists of the new Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 Quadriptyque. Occupying the 7 o’clock position on the recto face of the case, a flying tourbillon —thus called because the absence of an upper bridge allows it to appear as if it is floating— makes one rotation a minute, continuously varying the position of the balance in order to achieve a single corrected average time measurement. The balance is the heart of any watch movement, and it is also the key to our measurement of time. As it beats in regular cadences of 3Hz —21,600vph—, every eight beats mark the passing of one second. The seconds accumulate into minutes, into hours, days, weeks, months and years.

The recto face of the Quadriptyque case, illustrating the uppermost abilities of mechanical horology, shows the indications of a perpetual calendar. It also takes leap years into account, displaying a 29th day in the month of February every four years. Highlighting the precision of the Jaeger-LeCoultre Calibre 185 construction, the perpetual calendar indications are instantaneous, changing at the stroke of midnight. In addition, the complexities of the Calibre 185 construction required the date to be displayed at the 5 o’clock position on the dial. At Jaeger-LeCoultre, only the perfect legibility of a grande date was considered acceptable for a watch of such prestige, which necessitated the creation of a new system of date display discs in order to accommodate the dimensions of the flying tourbillon at 7 o’clock. The opening chapter of the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 is nothing less than a powerful statement of how la Grande Maison has comprehensively mastered the expression of civil time.

There are extremely few watchmaking manufactures that possess in-house expertise in sonnerie wristwatches. There are even fewer that have been making them since 1870, accumulating one and a half centuries of experience and savoir-faire. There exists only one watchmaking manufacture that has over 200 chiming watch calibres in its historical and modern inventory —La Grande Maison du Sentier. The verso face of the Quadriptyque case is a virtuoso tour de force of Jaeger-LeCoultre’s patrimony as a master and innovator of chiming watches.

With the slide of a lever located just above the crown, the Quadriptyque unleashes its melody. First, a series of low notes, correlating to the number of hours. Second, an alternating couplet of high and low notes, corresponding to the quarter-hours. And concluding the melody, a succession of high notes, indicating the number of minutes to be added to the elapsed quarters. In concert, the hours-quarters-minutes chime plays the current time in musical code. The striking works of the Reverso Quadriptyque are completely exposed alongside a secondary time display, indicating the same time as the recto dial, but in a jumping-hours and peripheral-minutes format. As the Quadriptyque strikes the time, setting a symphony of springs, cams, hammers and gongs into motion, their acoustic report confirms the visual display of the secondary dial.

Visible through apertures on the movement plate hand-decorated with the guillochage motif known as clous de Paris are elements of the chiming mechanism uniquely associated with the sonnerie expertise of Jaeger-LeCoultre. These include the silent chime governor, patented by the manufacture in 1895 to eliminate the buzzing noise created by the older anchor system.

More recent in-house innovations showcased in the Quadriptyque are the crystal gongs —first seen in the Master Minute Repeater Antoine LeCoultre of 2005— that attach the repeater gongs directly to the sapphire crystal to exploit the material’s optimal acoustic properties, the square cross-sectional profile of the gongs themselves that maximize contact and energy transmission between the hammers and gongs developed for the 2009 Hybris Mechanica Duomètre à Grande Sonnerie that deliver a clean and strong strike to the gongs. In totality, these innovations allow Jaeger-LeCoultre minute repeaters to produce some of the loudest and clearest chiming wristwatches today.

Debuting in the Reverso Hybris Mechanica Calibre 185 is a completely novel engineering of the chiming components to create a seamless chime with no pauses in between the hours, quarters and minutes. The conventional minute repeater mechanism utilizes special pivoting racks that read the time off a series of cams and then proceed to activate each group of chimed notes in turn.

This often results in silent gaps between the groups of chimed notes, especially when there are only hours and minutes to be struck, with no intervening quarters. The Hybris Mechanica Master Ultra Thin Minute Repeater Flying Tourbillon in 2014 and Master Grande Tradition Gyrotourbillon Westminster Perpétuel in 2019 made exceptional strides in chiming know-how by reducing these silent gaps, but the Reverso Quadriptyque has reached the ultimate stage of expertise in this area. By refining and inverting specific steps in this mechanical sequence, the Quadriptyque has succeeded in eliminating these gaps entirely.

The chime of the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 is an uninterrupted opus of acoustic excellence. It is the sound of innovation at its very apex.

Before the formal development of time reckoning systems, primitive societies observed celestial phenomena and created powerful myths and stories around the dance of the heavenly orbs above. The earliest astronomers were also mathematicians, and instruments constructed on their formulations were able to mechanically compute the positions of various celestial objects. The interaction between the various orbits of the Sun, Earth and Moon determine the rhythms of life, and watchmaking first evolved as a means to bring order to the world around us. As a watch manufacture with close to two centuries of fine watchmaking expertise, Jaeger-LeCoultre has mastered all aspects of time expression, from the quotidian to the esoteric. One of the hallmark complications of Jaeger-LeCoultre is the display of sidereal time, time that is determined with reference to the stars instead of the Sun, first presented in the Master Grande Tradition Grande Complication in 2010.

This year, for the first time ever in the history of mechanical horology, Jaeger-LeCoultre unites three displays of lunar information —the synodic cycle, the draconic cycle and the anomalistic cycle— in a single wristwatch. This unique micromechanical combination of indications, located on the interior face of the cradle of the Reverso Hybris Mechanica Calibre 185, allows the determination of eclipse events —both solar and lunar— and rare lunar phenomena such as supermoons.

Occupying the top half of the interior face of the cradle of the Reverso Quadriptyque is a massive representation of the phases of the moon in the Northern Hemisphere. A laser-engraved moon is progressively covered and revealed by a mobile blue lacquer disc with gold glitter décor, corresponding to the age of the moon in the synodic cycle. While conventional displays of the moon phase accumulate one day of error after 32.5 months, the moon phase display of the Quadriptyque requires only one adjustment after 1,111 years.

Just below the moon phase display, on the left, is a counter with a three-dimensional micro-sculpted pink-gold sun orbited by a tiny hemispherical moon. This counter shows the draconic cycle, showing when the path of the Moon intersects with the orbit of the Earth around the Sun —known as the ecliptic. Such an intersection takes place twice in each cycle, indicated by the horizontal alignment on the counter of the moon and the sun. At this time, the Moon, Earth and Sun are all on the same plane; however, they may not be aligned. For them to be aligned, a phenomenon known as syzygy, an additional condition must be fulfilled — the Moon must be either in its new or full phase. When that happens, an eclipse event happens on Earth, either a lunar eclipse if the Moon is in its full phase, or a solar eclipse if the Moon is in its new phase. However, the actual visibility of the eclipse is dependent on various factors such as the geographical position of the viewer.

To the right of the draconic cycle counter is a domed representation of the Earth, micro-painted in enamel, with a hemispherical moon in eccentric orbit around it. This counter represents the anomalistic cycle, showing the varying distance between the Earth and Moon. At its apogee, the Moon is at its furthest distance from the Earth and is closest at its perigee. When the Moon is in its full phase near or at the perigee, an event known as a supermoon occurs, in which the Moon can appear to be up to 14 percent larger than usual in the sky.

The display of the synodic, draconic and anomalistic cycle together in a wristwatch is unprecedented in horology, with the latter two indications protected by patent, making the Reverso Hybris Mechanica Calibre 185 the only watch ever made to provide such depth of information about astronomical phenomena.

The Jaeger-LeCoultre Reverso was born in 1931, out of the need to protect delicate horological mechanisms amidst the balletic skirmish of hooves and mallets during games of polo. Today, 90 years later, a far older dance is reflected in the Reverso Hybris Mechanica Quadriptyque, one that guides our calendrical rhythms according to rules that are as precise and structured as those of the regal equestrian sport.

The original Reverso bore a single time-telling face, with a mobile case that could be turned over within its cradle, revealing a solid caseback. The next generation of the Reverso featured another dial on its caseback, either in a different design to accommodate the wearer’s aesthetic preference as in the Duetto or displaying a second time zone as in the Duoface to offer additional functionality when travelling. The Reverso Hybris Mechanica à Triptyque in 2006 represented an evolutionary leap in horological innovation, with a third display positioned on the interior face of the Reverso cradle.

This year, the world’s first wristwatch with four faces premieres in the form of the Reverso Hybris Mechanica Calibre 185 Quadriptyque, the ultimate expression of the Reverso concept. On the last face of the Quadriptyque, the exterior face of the cradle, a representation of the phases of the Moon in the Southern Hemisphere is shown. Most indications of the moon phase are of the Northern Hemisphere perspective, and the Quadriptyque’s display of the Southern Hemisphere moon phase on its fourth face is the fulfillment of the Reverso’s fundamental dualism. A star-flecked sky chart, engraved and lacquered in a gradient of blue shades forms the backdrop to the pink-gold moon, all of which are created in the Atelier des Métiers Rares of Jaeger-LeCoultre.

The secret to the Reverso Hybris Mechanica Quadriptyque’s fourth 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.

Cased in 18K white gold, the Jaeger-LeCoultre Reverso Hybris Mechanica Calibre 185 measures 51.2 mm x 31 mm x 15.15 mm. The manual wound movement has a power reserve of 50 hours and the watch is water resistant to 30 meters. The watch is delivered on a blue alligator strap and 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 over-correcting the watch or damaging the movement, since the entire process is controlled by the box corrector mechanism.

The Jaeger-LeCoultre Hybris Mechanica Calibre 185 Quadriptyque is available in a highly exclusive limited edition of only 10-pieces.

Sticker Price €1.35 Million Euros —approximately $1.65 Million USD. For more info on Jaeger-LeCoultre click here.