The Chronomètre FB 2RE is a wristwatch by Ferdinand Berthoud.

Presented in spring 2022 at the Watches & Wonders Geneva, the Chronomètre FB 2RE pays tribute to the genius of watchmaker Ferdinand Berthoud. Its architecture and design are inspired by the Marine Clock No. 6 and it introduces a new movement, a symbol of excellence and chronometric precision: the Calibre FB-RE.FC with remontoir d’égalité.

The remontoire is traditionally very energy-intensive, particularly because of the friction it generates. Chronométrie Ferdinand Berthoud has reduced this friction by installing the remontoire where the torque is lowest. The escape wheel is the one that receives the least force from the entire gearing and is therefore the best candidate for the position. In addition, the use of the ruby cam and an extremely light seconds hand (0.01 grams), thanks to the use of titanium and an extremely tapered shape, reduces the weight driven by the remontoire. All these decisions together enable the FB-RE.FC calibre to offer a power reserve of 50 hours.