Renowned for its horological mastery and its creative talent, Jaeger-LeCoultre now wishes to share the fruits of its expertise with a broader public. This is why it is introducing an original collection with a pure, uncluttered design, driven by a new Haute Horlogerie calibre encapsulating the inventive spirit of the Manufacture. Geophysic® line reveals its gripping story, so that we can better tell our own. The first glance reveals a clean-cut design that is the epitome of elegance and equilibrium. Each model in the Geophysic® line features several layers of meaning. It gradually unleashes a powerful and innovative horological content expressed through classic characteristics. This refined and contemporary creation asserts its masculine nature in a number of subtle ways. The collection is named after a watch that belongs both to universal history and to the heritage of the Manufacture. In 1958, the International Geophysical Year, Jaeger-LeCoultre created a chronometer for scientists on mission. Capable of withstanding the magnetic fields of the North Pole while losing nothing of its formidable precision, its overriding characteristic was extreme resistance. Whether in True Second® or Universal Time versions, the Geophysic® conveys a constant intensity. 

It cultivates an attitude entirely in tune with the times. The message of the Geophysic® is one of simplicity and complexity co-existing in perfect harmony. The movements driving the Geophysic® collection, automatic Jaeger-LeCoultre Calibres 770 and 772, are synonymous with high precision and mechanical beauty. These calibres called upon the talents of the most highly specialised engineers of the Research & Development division within the Manufacture. The strength of their expertise and their imagination drives their authentic capacity for innovation. The latter is in this instance expressed by an atypical balance wheel featuring a non-circular configuration that required lengthy research in order to reduce air friction. Named the Gyrolab®, this device was initially developed in a laboratory version back in 2007 to equip the Master Compressor Extreme Lab 1 watch. It took eight years to transition from this confidential version to one that could be incorporated into an entire watch line. Geophysic® is the first collection to enjoy the full benefits of this key breakthrough and its determining influence on the precision of the watch.

Refinement and discernment

Nothing that Jaeger-LeCoultre does is governed by exclusively external considerations. This is demonstrated by the case of the Geophysic® True Second® watch which measures exactly 39.6 millimetres, an elegant and reassuring diameter confirming its cultural roots in the field of Haute Horlogerie, and the choice of which was determined by a quest to find the perfect size enabling the watch to express perfect harmony. Geophysic® explores the subtle nuances of contemporary classicism, reinforced by the traditional hands reflecting the codes of the Vallée de Joux as well as the linear hour-markers. The design of the case in turn reveals another facet of its personality through finishes worthy of the most precious Jaeger-LeCoultre models. The lugs do not meet the case middle with a gentle curve, but rather with a decisive angle expressing strength and confidence.

Their sides are polished to accentuate their sleek silhouette. In becoming better acquainted with the watch, the observer realises that its bezel slightly overlaps a tiny part of the case and lugs, thereby creating an extremely pure overall aesthetic. The case-back is screwed in, like that of the 1958 model, so as to ensure greater water resistance. This flowing visual effect is enhanced by the fact that the eye does not linger on any screws, while the watch features the inherent reliability of a system traditionally used to equip diver’s watches. Finally, the case middle also echoes the inspirational original with its extremely dynamic Super-Luminova®* dots that enable easy read-off even in the dark. The balanced, refined and unostentatious tone is set in subtle touches, leaving plenty of scope for the reactions that this exceptional watch unfailingly provokes.


For Jaeger-LeCoultre, mechanical performance is meaningless if it is not matched by beauty. At first glance, the calibre reveals its relationship to the characteristic line of automatic movements from the Grande Maison. The gaze then becomes aware of the more generous volumes, and of the construction whose effectiveness is expressed on the dial by a pleasantly rhythmical reading of the seconds. 

This specific expertise, which has been mastered by the Maison since the 19th century, testifies to the authentic instrument-worthy nature of the Geophysic®.

The true second

This precision is also expressed by the true seconds system that causes the seconds hand to move forwards while “beating the second”, meaning by performing a jump every second. This is no ordinary feat for a mechanical movement, and one that does not disturb the smooth running of the watch. 

True seconds mechanism involves an extremely sophisticated construction whose effectiveness is expressed on the dial by a pleasantly rhythmical reading of the seconds. This specific expertise, which has been mastered by the Maison since the 19th century, testifies to the authentic instrument-worthy nature of the Geophysic®.

Jaeger-LeCoultre Calibre 770

The remarkable calibres driving the Geophysic® line are the first to feature an oscillating weight – crafted from a single block of solid gold – bearing the ‘anchor’ motif (itself echoing the shape of a escapement lever) that is also the Jaeger-LeCoultre logo. Strategically cut out and more open than a classic weight, it enables the eye to reconstruct the movement that it generously reveals in the course of its rotations. These calibre exude a resolutely technical aura, much like a car engine built to ensure optimal performance. 

They deliver a degree of reliability and precision certified by the rigorous “1000 Hours Control” that Jaeger-LeCoultre is the only Manufacture to implement. Despite the sophisticated nature of these mechanisms, they are both functional and easily adjustable by merely positioning the crown. Here, Jaeger-LeCoultre transposes the philosophy of the namesake historical model into a resolutely contemporary watch.


Reference Q801 25 20 Case: pink gold, Ø 39.6 mm, 11.7 mm thick. Dial: silver-toned, grained, applied hour-markers. Hands: baton-type, enhanced with Super-Luminova®. Movement: mechanical automatic Jaeger-LeCoultre Calibre 770, 40-hour power reserve, 28,800 vibrations per hour, 275 components. Functions: hours, minutes, true seconds, date. Strap: alligator leather, pin buckle. Water resistance: 5 bar.

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