Exploring the dark side of the ocean omega has evolved its ceramic expertise to produce the seamaster planet ocean deep black this remarkable 455 mm timepiece is the combination of a gmt model and a diving watch it is coloured totally black to represent the ocean at a depth of 300 m the glossy and brushed casebody has been crafted from a single block of ceramic the same material used for the unidirectional bezel and the dial with arabic numeralsa new gmt ring has also been fixed on the