Noticeable throughout the caseback, the oscillating mass with the movement is delicately engraved. It really is made from 18-karat gold and decorated by hand by using a barley grain pattern, performed by guilloche Hailing from Redondo Beach front, California, Sean’s enthusiasm for structure and all matters mechanical begun at birth. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/