Seen with the caseback, the oscillating mass in the motion is delicately engraved. It is actually made from 18-karat gold and decorated by hand using a barley grain pattern, performed by guilloche Crafted by Swiss watchmaker Tissot, the T-Classic Gentleman has the many core attributes of a terrific dress watch: https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/