Visible from the caseback, the oscillating mass with the movement is delicately engraved. It can be created from eighteen-karat gold and decorated by hand with a barley grain sample, carried out by guilloche So If the Omega has the words ‘Grasp Chronometer’ about the dial—as is witnessed Within this signature https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/