Seen in the caseback, the oscillating mass in the motion is delicately engraved. It really is made out of eighteen-karat gold and decorated by hand with a barley grain pattern, accomplished by guilloche A gold Model incorporates a black dial and black leather-based strap, and also an eighteen-karat gold pin-buckle https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/