The watch must have passed the Chronofiable test
The Chronofiable test takes the form of various stages, namely:
- an ageing cycle,
- test cycles designed to measure the pull-and-push forces on the stem,
- test cycles designed to measure the forces exerted on the pushbuttons (chronograph controls, correctors, etc.) and the turning bezel,
- tests on reactions to magnetic fields,
- shock-resistance tests using a heavy pendulum or striker, except for delicate complications,
- water resistance test.
The following number of watches (without the bracelet) must be submitted:
- For a model produced in a series of 1 to 100 units: 5 units
- For a model produced in a series of 101 to 200 units: 10 units
- For a model produced in a series more than 201 units: 20 units