Jaeger-LeCoultre Watches : In 1833 Antoine LeCoultre (1803-1881) founded a small workshop, which was to become the Manufacture Jaeger-LeCoultre.In 1844, LeCoultre measured the micron (μ) for the first time; he created the worlds most precise measuring instrument, the millionometer (a devise capable of measuring to the nearest thousandths of a millimeter).Among vintage watch collectors, an assumption sometimes arises that watches branded "LeCoultre" were made by JLC for the U.S. market and were cased and timed in the U.S. in order to avoid the tariffs of the time on imported watches. In fact, the "LeCoultre" brand was made by Longines-Wittnauer between 1935-1985 using JLC movements and cases supplied by Longines-Wittnauers suppliers. However, the "LeCoultre" brand is not otherwise affiliated with Jaeger-LeCoultre
