ZENITH Solidifies its Global name because the foremost manufacturer of precision chronometers and instruments throughout many domains. ZENITH launches the 135-Observatoire restricted edition, building the acclaimed a hundred thirty five calibre, serial winner of the Worldwide Chronometry competitions, commercially obtainable for the extremely 1st time in its Observatory variant ! https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/