Certina | Nivachron™ balance spring inside the Certina DS-1 Big Date Special Edition - YouTube
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Certina - The NEX Scratchguard coating and the magnetic field-resistant Nivachron™ balance spring make the DS PH200M as solid as a rock. #CountOnMe 📸 : Photofever.com - Photos inspire Emotions | Facebook
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Swatch Group and Audemars Piguet develop a new alloy for balance springs called Nivachron