THE OC+ LABEL OF THE GENEVA OBSERVATORY FOR CHRONOMETRY (TIMELAB)
The OC+ label is a certification developed by the Timelab Foundation, which goes beyond the standards of ISO 3159 standard “certified chronometer”. It is exclusively reserved for Swiss watches. Tests are carried out on watches fully assembled in their case, in order to reproduce real conditions of use.
The protocol includes a series of thorough tests, spread over 21 days, which cover in particular:
- • Chronometric accuracy: evaluation according to the ISO 3159 standard, supplemented by a wearing simulation.
- • Power reserve : verification that the watch runs for the intended duration without winding.
- • Water resistance : Tests compliant with the ISO 22810 standard, including air overpressure, immersion, and condensation tests.
- • Magnetic resistance : evaluation according to the ISO 764 standard, exposing the watch to a magnetic field of 4,800 A/m in different positions.
Successfully passing all these tests is required to obtain the OC+ label and attests to a high level of reliability and performance.
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