In the early 20th century, Jacques-David LeCoultre took up the challenge presented to Swiss watch manufacturers by the French industrialist Edmond Jaeger, who wished to develop the production of ultra-thin watches. Their encounter marked the start of a fruitful collaboration that would culminate several decades later in joining their names for posterity.

It gave rise in 1907 to the introduction of the Calibre 145 pocket-watch movement meeting Parisian designers’ wish for discretion and refinement. Its stupendous 1.38 mm slenderness earned it the title of the world’s thinnest watch movement, a record it still holds in its category.

Produced for half a century, it nurtured the tradition of ultra-thin Haute Horlogerie watches that Jaeger-LeCoultre still cultivates today… Stay tuned!