Motion: There are 3 differing kinds to consider. A quartz movement is known for its accuracy and small upkeep. It can be powered by a battery and is mostly more very affordable. When your Omega has the phrases 'Master Chronometer' around the dial—as is found during the Seamaster Diver 300M—you https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/