Seen with the caseback, the oscillating mass on the movement is delicately engraved. It truly is made from 18-karat gold and decorated by hand with a barley grain pattern, completed by guilloche So if your Omega has the terms ‘Grasp Chronometer’ about the dial—as is observed in this signature Omega https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/