ZENITH Solidifies its Global track record because the main manufacturer of precision chronometers and instruments across numerous domains. Ming did not just slap the movement inside a situation and get in touch with it per day. The actions have been overhauled, up-to-date, and refinished by La Joux Perret in La-Chaux-de-Fonds. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/