Founded by Antoine LeCoultre in 1833. 90 years later his grandson, David met Edmund Jaeger.
In 1925 the companies merged but it wasn't until 1937 that they launched the famous brand. Famed for the smallness of things chronographical to push watch-making to its limits. The smallest mechanical movement, the smallest quartz movement, the smallest analog chronograph movement have been achieved by its impressive research developments.
In the early 1900's it produced many components for other famous houses.
Many famous heads-of-states and other dignitaries have been presented with their Atmos clock by the Swiss Government.
The Millonometer was the first instrument capable of measuring accurately to one thousandth of a millimetre.
Queen Elizabeth II owns a 2 Ligne watch, the smallest in the world. She wore it for her coronation in 1953.