An integral part of the Grande Maison’s heritage, the Jaeger-LeCoultre ultra-thin watch has written some of the most beautiful pages of modern watchmaking, illuminating the 20th century with innovations and exceptional creations. In 1903, the French manufacturer of marine chronometers Edmond Jaeger wished to combine technology with refinement. He chose to focus on the production of ultra-thin watches. Since his workshop did not allow him to machine all the components he required, he turned to Swiss manufacturers. Jacques-David LeCoultre took up the challenge and the two men went into partnership. Together, they created the thinnest calibres in the world.