Noticeable throughout the caseback, the oscillating mass on the movement is delicately engraved. It is actually comprised of 18-karat gold and decorated by hand having a barley grain sample, performed by guilloche Hailing from Redondo Seaside, California, Sean’s passion for design and style and all points mechanical started out at https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/