Omega Launched its Constellation Globemaster, the main timepiece branded with the “Learn 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 tests demanded for COSC chronometer certification but are subjected to another, more comprehensive battery https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/