Visible through the caseback, the oscillating mass from the motion is delicately engraved. It is created from 18-karat gold and decorated by hand by using a barley grain pattern, carried out by guilloche So Should your Omega has the words ‘Grasp Chronometer’ around the dial—as is found Within this signature https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/