This stylish omega seamaster planet ocean 600m master chronometer gmt pays homage to omegas dive watch heritagethis model with its scratch resistant sapphire crystal features a black ceramic dial with arabic numerals a date window at the 3 oclock position and a central gmt hand mounted on the 435 mm stainless steel case is the worlds first polished bi ceramic black and white bezel here the numerals and scaling are delivered in contrasting colours to separate night from day he omega s