JVS Ceramics [Jet Black Seamaster, Unruly Appearance] Omega Seamaster Series 300M Watch! The 143.50MM case bezel and corrugated pattern dial are made of black zirconium oxide 1Zr021 ceramic. 2 The hollow hands and the dot at 12 o’clock are covered with Suer-LumiNova luminous coating. 3 The beauty of the movement is clearly visible , you can appreciate the 8806 movement through the sapphire glass case back with a corrugated edge design.