Motion: There are 3 differing kinds to consider. A quartz movement is known for its accuracy and minimal servicing. It is really run by a battery and is mostly additional affordable. If the Omega has the terms 'Master Chronometer' around the dial—as is viewed in the Seamaster Diver 300M—it is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/