A demonstration of skill by the master watchmaker who creates it, the watch with tourbillon has been synonymous with precision since the beginning of the 19th century. The operation of a watch differs depending on its position, especially when vertical. The earth's pull, which is the principle cause of this phenomena, leads to an imbalance between the balance and the hairspring. To compensate for this and to rebalance the two components, the regulating organ and the escapement are housed in a circumrotating carriage. Thus, the balance and hairspring system is held at the centre of the carriage's rotations during oscillation. The aim is to mitigate the negative effect of gravity on the movement to the point of compensating for it entirely. Jaeger-LeCoultre masters the art of this complication and has offered watches with tourbillons since 1946, the year when the Calibre 170 first emerged from its workshops. More recently, Jaeger-LeCoultre's watches with tourbillons have been enhanced with three technical achievements. The first, the Gyrotourbillon, is featured on the Master Grande Tradition, Calibre 176. It rotates through an exterior traction that enables it to break away from the traditional tourbillon bridge. The second is called the Sphérotourbillon. This multi-axis mechanism draws its inspiration from earth's own rotating axis and features on the Duomètre Sphérotourbillon, Calibre 382. The third achievement is the orbital flying tourbillon, which frees itself from its fixed position to indicate the hour while making the circumference of the dial of the Hybris Artistica Mystérieuse, Calibre 941.