Noticeable throughout the caseback, the oscillating mass in the motion is delicately engraved. It really is produced from 18-karat gold and decorated by hand by using a barley grain pattern, carried out by guilloche Hailing from Redondo Seaside, California, Sean’s passion for design and all issues mechanical begun at beginning. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/