Obvious in the caseback, the oscillating mass of your motion is delicately engraved. It is made out of 18-karat gold and decorated by hand having a barley grain pattern, finished by guilloche Should your Omega has the text 'Learn Chronometer' to the dial—as is noticed while in the Seamaster Diver https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/