- Precision, measured by the COSC --the Swiss Official Chronometer Testing Institute.
- Durability and reliability, measured by Chronofiable tests.
- Precision when worn, tested by a 24-hour test on a Fleuritest simulator developed by the Foundation.
- Technical and aesthetic quality which correspond to the requirements of the haute horlogerie.
The new criterion is probably the easiest to achieve compared to the others. Currently the seal has been stamped on the likes of Chopard and Vaucher. It's no easy feat, but it's one that every Swiss watchmaker desires.