When did cartier use jaeger lecoultre movements in there watches?

Answer 1

In 1903, Parisian Edmond Jaeger challenged Jacques-David LeCoultre, grandson of Antoine, to manufacture ultra-thin calibers of his design.[1]:21 Out of their relationship emerged a collection of ultra-thin pocket watches, followed by others that eventually, in 1937, officially culminated in the Jaeger-LeCoultre brand.[1]:21 In 1907, French jeweler Cartier, a client of Jaeger's, signed a contract with the Parisian watchmaker under which all Jaeger's movement designs for a period of 15 years would be exclusive to Cartier. The movements were produced by LeCoultre. Also in 1907, the LeCoultre Caliber 145 set the record for the thinnest movement at 1.38 mm.[1]:22 JLC began manufacturing the Atmos clock in 1936 after purchasing the patent from Jean-Leon Reutter, who invented it in 1928. The company was officially renamed Jaeger-LeCoultre in 1937. In 1941, Jaeger-LeCoultre earned the highest distinction from the Neuchâtel Observatory for its tourbillon Caliber 170. In 1982, the Jaeger-LeCoultre museum was established in Le Sentier. In 2009, JLC produced the world's most complicated wristwatch, the Hybris Mechanica à Grande Sonnerie with 26 complications.

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