COSCsertifioinnin
COSCsertifioinnin refers to the certification process by the Swiss Official Chronometer Testing Institute (COSC) that verifies the precision of watch movements, i.e., the components that drive the watch, rather than the entire assembled timepiece. The certification is an independent, industry-standard test used by many Swiss brands to demonstrate a high level of accuracy.
The testing is movement-based. Movements are submitted to COSC and tested in laboratory conditions in multiple
In practice, many brands incorporate COSC certification as part of their quality assurance. Some watches are
Limitations and context are important. COSC certification confirms performance under laboratory conditions and for the movement