Seen through the caseback, the oscillating mass on the motion is delicately engraved. It really is constructed from eighteen-karat gold and decorated by hand which has a barley grain sample, done by guilloche Hailing from Redondo Seaside, California, Sean’s passion for structure and all factors mechanical started off at beginning. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/