CHE105908120avenue Léopold-Robert 65, 2301 La Chaux-de-Fonds
Contrôle officiel suisse des chronomètres (COSC) is a Swiss Verein based in La Chaux-de-Fonds, registered in the commercial register.▍
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Company facts reflect public commercial-register data. Officer and relationship data is derived from published register text. Register data as of 4 July 2026.
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