Ball Watch Company
Baume et Mercier
Bell & Ross
The partnership between Jaeger and LeCoultre began between the grandson of Antoine LeCoultre, Jacques-David LeCoultre and watchmaker Edmond Jaeger in 1903. Jaeger had LeCoultre make him an ultra-thin caliber. They would begin making ultra-thin pocket watches together. In 1937, they would officially create the Jaeger-LeCoultre brand.
The story for LeCoultre dates back to 1833 when Antoine LeCoultre (1803-1881) began his workshop in Le Sentier, Switzerland. He was known for creating the most precise instrument of 1844, the millionometer, possessing the ability to measure up to a thousandth of a millimeter. In addition, Antoine LeCoultre invented a key-less system to rewind and set watches using a push piece instead.
LeCoultre's legacy would further be cemented when Elie LeCoultre, son of Antoine, decided to make LeCoultre a true manufacture in 1870.
Edmond Jaeger was a watchmaker who had a 15 year exclusive contract with Cartier from 1907 to 1922 for his movement's designs.