Omega Launched its Constellation Globemaster, the primary timepiece branded Together with the “Master Chronometer” designation, in 2015. Watches using this type of accolade — which now comprise the lion’s share of Omega's output — have not just aced the tests needed for COSC chronometer certification but are subjected to another, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/