Located in the Joux Valley of the Jura Mountains of Switzerland, the Jaeger-LeCoultre Manufacture has honed its skills in producing high-quality timepieces since its founding in 1833. By 1900, over 350 calibers had been produced, of which 128 had a chronograph function and 99 had a repeater function. Furthermore, for 30 years after 1902, we provided a large number of high-precision movements for Patek Philippe. In 1907, he successfully developed the world's thinnest pocket watch, the 1929 Caliber 101, composed of 74 parts and weighing just 1 gram, the world's smallest hand-wound caliber. In 1931, the reversible case Reverso made a big break, and in 1968, the Holaris was equipped with a patented system for optimizing sound transmission underwater. For 2013, a new type of timepiece without a gyrotourbillon bridge was presented. Since its founding, more than 1,200 calibers have been produced, and various lineups continue to evolve, pushing the watch industry to the top level.