Noticeable from the caseback, the oscillating mass with the motion is delicately engraved. It's created from eighteen-karat gold and decorated by hand which has a barley grain sample, done by guilloche A paragon of robustness and reliability, the 40 mm Oyster scenario of The brand new GMT-Master II is certain https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/