Noticeable through the caseback, the oscillating mass of your motion is delicately engraved. It is made from 18-karat gold and decorated by hand using a barley grain sample, accomplished by guilloche So if your Omega has the phrases ‘Grasp Chronometer’ over the dial—as is seen Within this signature Omega Seamaster https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/