Visible throughout the caseback, the oscillating mass of your motion is delicately engraved. It can be produced from 18-karat gold and decorated by hand by using a barley grain sample, completed by guilloche A gold Variation features a black dial and black leather strap, along with an 18-karat gold pin-buckle https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/