#F.P. Journe

A resonance watch runs two independent movements in one case, tuned to synchronize through mechanical vibration. A working dealer's plain-English guide to how it works, where the idea came from, and whether it actually improves accuracy.

A working dealer's F.P. Journe buying guide covering the Chronometre Bleu, Chronometre a Resonance, Astronomic Souveraine, Centigraphe Sport, and Elegante, with real reference numbers, calibers, and sourced pricing.