The F.P. Journe Tourbillon Souverain watch, introduced in 1999 by François-Paul Journe, is a remarkable timepiece known for its precision and craftsmanship. This watch features a unique Invenit et Fecit mechanism, making it one of the most accurate tourbillon wristwatches with a remontoire available. The 40mm case comes in platinum, allowing a view of the intricate mechanism through a transparent sapphire crystal case-back. The white gold dial showcases steel circles screwed onto the face, with silver "guilloché" dials for hours, minutes, and seconds.