One of the most historic names in Swiss watchmaking, Jaeger-LeCoultre was born in the Joux Valley, in the Swiss Jura, back in 1833. The specialization of the Maison created by Antoine LeCoultre was immediately to create the best-worked and most precise movements possible. In 1866, manufacturing was made more controlled and efficient by bringing together all the processing phases in a single factory, an operation not taken for granted at a time when it was normal to rely heavily on subcontractors. In the early twentieth century, the Parisian watchmaker Edmond Jaeger established a fruitful cooperation with the Swiss watchmaker. The collaboration led to the creation of very popular ultra-flat movements, whose success was such that it led to a change in the name of the house, since then known as Jaeger-LeCoultre. Also in the first half of the twentieth century, the Atmos clock was developed, a clock that draws its energy from the thermal expansion of the air. A temperature change of one degree centigrade is enough to give this watch a power reserve of forty-eight hours. Another great success of Jaeger-LeCoultre dating back to the early twentieth century is the Reverso, a watch still appreciated for its Art Decò lines and for its unmistakable flip-up case, originally designed to protect the dial from the blows received in games of polo shirt by British officers stationed in India. The Jaeger-LeCoultre Memovox Polaris, a one-of-a-kind alarm clock, dates back to the second half of the twentieth century: it is in fact able to function - and play - regularly even underwater. Today Jaeger-LeCoultre realizes the Master collection, with elegant lines, the Atmos, with the “thermally charged” movement, the “double” movements of the Duomètre collection and the virtuosic complications of Hybris Mechanica. There are, of course, the famous Jaeger-LeCoultre Reverso for women and men, as well as the vintage-inspired Polaris line.