Seen through the caseback, the oscillating mass from the motion is delicately engraved. It is created from 18-karat gold and decorated by hand using a barley grain pattern, done by guilloche A paragon of robustness and trustworthiness, the 40 mm Oyster situation of The brand new GMT-Learn II is guaranteed https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/