Ferdinand Berthoud - Chronomètre FB 3 Only Watch

The Chronomètre FB 3 “Only Watch” is the result of several months of preparation and testing to obtain this unique patinated bronze case. Housed in this unique case is the world’s only calibre with a cylindrical balancespring officially chronometer-certified by the COSC. The colour and nuances are unprecedented and evoke to the discerning gaze the patina that naturally develops on the copper alloys of the precision and navigation instruments supplied by Ferdinand Berthoud
during the 18th century.