Omega Launched its Constellation Globemaster, the primary timepiece branded with the “Master Chronometer” designation, in 2015. Watches with this accolade — which now comprise the lion’s share of Omega's output — have don't just aced the checks required for COSC chronometer certification but are already subjected to a different, even https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/