Issued in an exclusive 50-piece series, the Chronomètre FERDINAND BERTHOUD FB 1.2 is the first model in the collection. Its vertical satin-brushed black dial is framed by an octagonal rose gold case with a black ceramic inter-horn space. Its sides feature four watertight portholes revealing the intricate workings of Calibre FB-T.FC with its pillar-type architecture. The transparent sapphire case-back provides a chance to admire the 1,120-part tourbillon movement with fusee-and-chain transmission. Four patent applications have been filed for certain mechanisms of this COSC-certified movement.