Noticeable throughout the caseback, the oscillating mass with the movement is delicately engraved. It is actually made out of eighteen-karat gold and decorated by hand having a barley grain sample, performed by guilloche So if your Omega has the terms ‘Grasp Chronometer’ to the dial—as is viewed Within this signature https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/