Obvious from the caseback, the oscillating mass of the movement is delicately engraved. It is created from eighteen-karat gold and decorated by hand which has a barley grain pattern, performed by guilloche If your Omega has the words and phrases 'Grasp Chronometer' on the dial—as is observed while in the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/