most excellent RM Richard Mille RM TZP tetragonal zirconia polycrystalline porcelain housing

RM Richard Mille RM TZP tetragonal zirconia polycrystalline porcelain shell, low-density wear-resistant friction, low thermal conductivity and other material characteristicso thathe bezel and bottom cover can be specially processed and polished to show High-brightness Lassarc surface.The Lassa effect of other ceramic materials is white and not clean.Japanese Citizen 6T51.Mechanical movement.100 waterproof!Size:42X50X16mm.