Noticeable throughout the caseback, the oscillating mass with the movement is delicately engraved. It's made from 18-karat gold and decorated by hand having a barley grain pattern, completed by guilloche Further more to that, Irrespective of its slender profile at the edge with the calibre, the modern oscillating mass is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/