Omega Introduced its Constellation Globemaster, the 1st timepiece branded with the “Learn Chronometer” designation, in 2015. Watches with this particular accolade — which now comprise the lion’s share of Omega's output — have not simply aced the tests expected for COSC chronometer certification but happen to be subjected to another, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/