FB 1L: The two faces of the moon

Through its innovative display of the age and phases of the moon, the Chronomètre FB 1L ensures chronometric precision and astronomical measurement.

Available in two ten-piece limited editions – with a case in 18-carat white gold and black ceramic lugs, or in anthracite ceramised titanium & sandblasted 18-carat white gold, this new collection displays the hours and minutes on a dedicated subdial at 12 o'clock, seconds in the centre and the 53-hour power reserve on the back of the movement. A large hand at 6 o'clock indicates the age and phases of the moon in a continuous back and forth movement. This patent-pending complication, combined with the constant force of the FB-T.FC.L calibre, ensures astronomical precision corresponding to a one-day difference in 577 years of operation.

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Ferdinand Berthoud