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 the addition of blue represents the last colour youll see in the ocean at a depth of approximately 275 m the matt casebody has been crafted from a single block of ceramic and rubber has been blended with ceramic to create a unique unidirectional bezel on the black ceramic dial