ZENITH Solidifies its Worldwide track record because the leading manufacturer of precision chronometers and devices across a lot of domains. Ming did not just slap the motion in a very circumstance and simply call it daily. The movements were being overhauled, updated, and refinished by La Joux Perret in La-Chaux-de-Fonds. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/