TOURBILLON SOUVERAIN MODEL, REF. T, NO. 206/03T, CIRCA 2004

Until the launch of the Reference TN or Tourbillon Nouveau in April 2004, the Tourbillon Souverain was powered by the rhodium-plated brass calibre 1498. From 2004 onwards, this was replaced by the 18k gold calibre 1403. Early models, such as the present timepiece with a brass movement, are therefore highly valued by collectors and are now recognized as significant historical turning points in the development of the brand.

Introduced at Baselworld in 1999, the Tourbillon Souverain Reference T holds a special place in F.P. Journe’s history as the brand’s first series-production watch, following the success of the initial group of 20 Souscription pieces. Additionally, the model was the first wristwatch to use a remontoire d'égalité, a constant-force mechanism that controls how much energy is transferred from the mainspring to the escapement. This invention significantly improves chronometric stability by guaranteeing constant torque to the tourbillon over the watch's 42-hour power reserve.

François-Paul Journe's technical and aesthetic philosophy, the development of a completely contemporary, extremely intricate wristwatch with a strong foundation in the great traditions of classical horology, is superbly embodied by the combination of the tourbillon and remontoire d'égalité.