Visible from the caseback, the oscillating mass of your motion is delicately engraved. It really is produced from 18-karat gold and decorated by hand with a barley grain pattern, carried out by guilloche A gold Variation 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/