The Ferdinand Berthoud Chronomètre FB1.2 and FB1.3 are in-house Fusée-Chain Chronometers equipped with a tourbillon. Featuring 44 mm octagonal cases with watertight openings —that allow for lateral view of the movement—, the Chronomètre Ferdinand Berthoud FB 1 is powered by a manual wound movement composed of no less than 1,120 components. Both watches are available in a highly exclusive limited edition of 50 pieces each with close to a quarter million dollars price tag.