The Observatoire Chronométrique+ submits every watch to a laboratory testing plan to ensure a high chronometry reliability. A watch certified Observatoire chronométrique + is a guarantee of a timepiece compliant with international standards.

The process

With a global testing plan including : water resistance, the chronometry standard applied on watch-head with an additional "au porté" dynamic phase, ... the Observatoire Chronométrique+  , certified timepieces with high level of accuracy.

Water resistance

Water resistance is a key feature for a reliable watch. The slightest trace of humidity or dust could damage the movement or affect its running. The Observatoire Chronométrique+ ensure that every certified watch is tested with the values stated by manufacturers.


The resistance to the magnetic field is a key feature for a reliable watch. Today, many of disturbances can affect the appropriate watch running. 

Measure of Chronometry

L'Observatoire Chronométrique+ ensures that the time lag is as insignificant as possible, for every certified chronometer watch.

Power reserve

For a watch, a power reserve is the remaining energy required for its running. The Observatoire Chronométrique+ ensures that the duration indicated by the power reserve is accurate in order to avoid an unexpected stop.