Jaeger-LeCoultre (French pronunciation: ​[ˈʒeʒɛʁ ləˈkultʁ]) is a luxury swiss watch and clock manufacture based in Le Sentier, Switzerland, that dates back to the first half of the nineteenth century, founded by Antoine LeCoultre in 1833.The brand has hundreds of inventions and over a thousand calibres to its name, including the world’s smallest calibre, one of the world’s most complicated wristwatches and a timepiece of near-perpetual movement.