Visible through the caseback, the oscillating mass on the movement is delicately engraved. It's created from 18-karat gold and decorated by hand using a barley grain sample, accomplished by guilloche A gold Model includes a black dial and black leather-based strap, as well as an eighteen-karat gold pin-buckle All of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/