Over time, a small community formed and in 1612, Pierre LeCoultre's son built a church there, marking the founding of the village of Le Sentier where the company's factory is still based today.

[10] In 1834, following his invention of a machine to cut watch pinions from steel,[11] Antoine LeCoultre (1803–1881) founded a small watchmaking workshop in Le Sentier, where he honed his horological skills to create high-quality timepieces.

[12] In 1844, he invented the world's most precise measuring instrument at the time, the Millionomètre, and in 1847 he created a keyless system to rewind and set watches.

[14] By the same year, the business employed 500 people and was known as the "Grande Maison of the Vallée de Joux", and by 1900, it had created over 350 different calibres, of which 128 were equipped with chronograph functions and 99 with repeater mechanisms.

In 1903, Paris-based watchmaker to the French Navy, Edmond Jaeger, challenged Swiss manufacturers to develop and produce the ultra-thin movements that he had invented.

[12] Edmond Jaeger also acquired the patent for the atmospherically driven clock Atmos from its inventor Jean-Léon Reutter and licensed it to LeCoultre from 1936 for France, and in 1937 for Switzerland.

The confusion stems from the 1950s, when the North American distributor of LeCoultre watches was the Longines-Wittnauer Group, which also was responsible for the distribution of Vacheron Constantin timepieces.

According to Jaeger-LeCoultre enthusiast Zaf Basha, the "Galaxy", an upmarket mysterious dial diamond watch, is a collaboration between Vacheron & Constantin and LeCoultre for the American market.

[8] In December 2018, World Wide Fund for Nature (WWF) released an official report giving environmental ratings for 15 major watch manufacturers and jewelers in Switzerland.

[23] In jewelry and watchmaking industry, there are general concerns over the lack of transparency in manufacturing activities and the sourcing of precious raw materials such as gold, which is a major cause of environmental issues such as pollution, soil degradation and deforestation.

[17] A list of notable watches from the Reverso line include the following: In 1925, the LeCoultre Calibre 7BF Duoplan was created in an effort to bring together miniaturisation and precision.

The Duoplan was insured by Lloyd's of London with a special after-sales service, and a damaged movement could be replaced in a few minutes, leading London-based store owner Tyme to display in its shop window: “You won’t have time to finish your cigarette before your watch is repaired”.

[32] The Duoplan led to the creation in 1929 of the world's still-smallest mechanical movement, the Calibre 101, whose 74 original parts (98 today) weighed a total of approximately one gram.

Wound by a capsule filled with a mixture of temperature-sensitive gases, a 1 °C fluctuation is enough to store sufficient energy to supply the clock with two days' autonomy.

[17] In 1988, the Kohler and Rekow design agency created a two-piece limited edition showcase for the clock and, in 2003, the Manufacture released the Atmos Mystérieuse, driven by the Jaeger-LeCoultre Calibre 583 and comprising 1,460 parts.

The watch was fitted with the Jaeger-LeCoultre Calibre 478BWS and featured seventeen jewels, a Breguet overcoil, a regulating spring on the balance-cock, a shock-absorber and a Glucydur balance.

The year of its release, the Geophysic was offered to William R. Anderson, the captain of the Nautilus, the first American nuclear submarine to travel between the Pacific and Atlantic oceans via the North Pole.

[17] Since 1931, Jaeger-LeCoultre has held close ties with the equestrian sports community and counts the Polo Club de Veytay as one of its partners.

The dashboard of the 1930s, 1.5-litre Aston Martin LM – a regular class winner in international motorsport – contained instruments created by Jaeger-LeCoultre.

[59] In 2012, in partnership with the Italian luxury leathergoods brand Valextra, Jaeger-LeCoultre began offering a two-tone version of its ladies’ Reverso watch.

Each year, the programme as well as the sites are featured in print and online news articles by the International Herald Tribune, thus offering increased visibility to the partnership.