Visible through the caseback, the oscillating mass from the motion is delicately engraved. It is constructed from eighteen-karat gold and decorated by hand by using a barley grain sample, accomplished by guilloche A gold Edition includes a black dial and black leather-based strap, in addition to an 18-karat gold pin-buckle https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/