The Chronomètre à Résonance series is one of F.P. Journe's crowning works, cementing his position as both a master watchmaker and visionary genius. The movement contains two balance springs, which through the resonance phenomena, synchronise in beat rate and improves the overall accuracy of the watch. The present example belongs to a very early batch of this landmark series, differentiated by its smaller case size of 38mm and movement made of brass instead of the later standard rose gold.