Certina´s new DS-2 Chronograph is certified by Contrôle Officiel Suisse des Chronomètres (COSC) to be accurate up to a 1/100th of a second. – Watch-Insider.com
Certina DS Royal 100M Quartz Chronograph + Date 42mm ref. C10417A | eBay
SOLD c1990 Certina DS Sapphire - Birth Year Watches