Jean Lassale was a Swiss watch company that designed the Calibre 1200, featuring the thinnest mechanical watch movement: 1.2 mm.[1] In the 1970s, Pierre Mathys,[2] master watchmaker in La Chaux-de-Fonds, designed and built the prototype of a revolutionary watch caliber, with the goal of making the thinnest watch in the world. To achieve this feat, Mathys based his design on the work of Robert Annen,[3][4][5] who previously had the idea of using ball bearings in small scale horology. Mathys decided to remove the bridges and counter-pivot, and instead use ball bearings for the axis.
Company history
The company Bouchet-Lassale was founded by Jean Bouchet-Lassale[6]