In 1770, following the success of the sea trials in 1768-1769 of Marine Clocks No.6 and No.8, Ferdinand Berthoud was awarded the title of "clockmaker and mechanic by appointment to the French King and Navy". The Chronomètre FB 2RE.2 reinterprets the architecture and design of the Marine Clock No. 6. This limited edition of 10 pieces features a round 18-carat rose gold case, fitted along its middle with a large panoramic window. It frames a black grand feu enamel dial with a complex two-tiered construction and an exceptional mechanism: the emblematic fusee-and-chain transmission combined with a one-second remontoir d’égalité mechanism.
The FB-RE.FC calibre, in addition to the constant-force mechanism, is equipped with a one-second remontoire visible on the back of the movement. It is one of the most complex torque regulation systems in the history of time measurement.
The case of the Chronomètre FB 2RE picks up the shape of Marine Clocks and this modular construction. The movement is installed in a cylindrical container of 44 mm in diameter and 14 mm thick made of 18-carat gold. A large panoramic window appears at 10 o'clock along the case middle in a screw-down frame and reveals the movement's pillar-type architecture, as well as the barrel and its chain.
The escape-wheel pinion is connected to the stop wheel and marks off the seconds. The entire assembly is connected to the central seconds hand and enables the Chronomètre FB 2RE to display true seconds, or deadbeat seconds, like marine chronometers or regulator-type longcase clocks.
The Chronomètre FB RSM, a tourbillon regulator with fusee-and-chain transmission, for the first time incorporates an independent deadbeat seconds visible on the dial side and a stop-seconds mechanism.
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