Omega Released its Constellation Globemaster, the main timepiece branded With all the “Master 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 needed for COSC chronometer certification but have been subjected to another, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/