Le Locle, 1947 A place in the Swiss Jura with approximately 12.000 citizens. One of the most important centers of Swiss watch industry since 1700. At the initiative of Charles Ziegels, who was ZENITH’s technical director at the time, engineer Ephrem Jobin starts with the design of a 30 millimeter chronometer caliber. A movement that … Continue reading ZENITH Cal. 135