Obvious throughout the caseback, the oscillating mass on the movement is delicately engraved. It is actually made from 18-karat gold and decorated by hand with a barley grain pattern, performed by guilloche Rapid Acquire: This can be Piaget at its ideal. As I wrote inside our GPHG preview, this felt https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/