Top 10 Certified Chronometer Watch Producers 2011 The COSC, or Controle Officiel Suisse des Chronometres, is responsible for the certification of the accuracy of precision watches produced in Switzerland. In other words, the COSC certifies whether the movement inside your luxury watch keeps accurate time. The COSC has strict standards and not every automatic watch will be… Continue reading Top 10 Certified Chronometer Watch Producers 2011
