Facts and figures A not-for-profit association officially recognised as serving the public interest. exclusively serving Swiss watchmaking. Approximately 60 permanent and 70 auxiliary employees employed by the 3 observation laboratories. An organisation accredited by the Swiss Accreditation Service (SAS) in Berne. Operates 7 days a week, about 350 days a year. More than 1.8 million timekeeping instruments tested per year. Maximum testing capacity of an observation laboratory: about 60,000 pieces per day. Only about 6% of all Swiss watches exported have the title of certified chronometer. Approximately 21% of the exported mechanical wrist watches are certified chronometers.