Motion: There are 3 different types to think about. A quartz motion is known for its precision and minimal upkeep. It is powered by a battery and is mostly extra economical. If the Omega has the phrases 'Grasp Chronometer' around the dial—as is seen in the Seamaster Diver 300M—you'll be https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/