Worldtimer Manufacture / Frederique Constant

There’s mechanical genius to the Frederique Constant Worldtimer Manufacture, and it lies in the simplicity of use of the watch — all functions are handled by using the crown. The Worldtimer function can be achieved simply by selecting the desired city and placing it at the 12 o’clock position on the dial. Internal discs automatically synchronise, and after that, it’s possible to see what time it is in any of the 24 cities on the dial. In addition, thin discs also indicate at a glance whether it’s day (white disc) or night (black disc) — via Perpetuelle