Noticeable with the caseback, the oscillating mass with the motion is delicately engraved. It can be created from 18-karat gold and decorated by hand by using a barley grain pattern, completed by guilloche A gold version encompasses a black dial and black leather-based strap, in addition to an 18-karat gold https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/