Escaping religious persecutions from Brie, a French region, LeCoultre family settled in Switzerland in the 16th century. Antoine LeCoultre creates his workshop in 1833 where he could fully live his passion: manufacturing time-pieces. He creates the most precise measurement instrument of the world. At the Universal exposition in 1851, he receives a gold medal. He will then provide mecanism for Patek Philippe as well as for Cartier. In 1903, Edmond JAEGER challenges watch-makers: producing his ultra-thin movement. This is Jacques-David LeCoultre, Antoine's grand-son, who wins and presents the thinnest watch of the world, with a calibre 145. Jaeger and LeCoultre & Cie start cooperating and the brand becomes Jaeger-LeCoultre. The cult Reverso shows close relations between polo and the brand.