Antoine Le Coultre
1826 to 1827
Invented a pinion-cutting machine.
Foundation of the first Le Coultre Manufacture workshop, today know as Jaeger-LeCoultre.
Invented the Millionometer (instrument to measure the micron).
Invention of the swing winder, one of the first reliable systems to wind a watch and set it without having to use a key.
The first mechanically-made repetition calibres and chronograph.
Invented a new winding mechanism.
Charles Antoine Le Coultre gradually retired. His three sons took over the factory with Edmond Jaeger at the beginnig of 1900. His grandson, Jacques-David LeCoultre, formed a partnership with the French watchmaker in 1903.