The stylish omega seamaster planet ocean 600m master automatic chronometer pays homage to omegas dive watch heritage the watch is water resistant to 600 metres 2000 feet 60 bar and has a helium escape valve it features a scratch resistant sapphire crystal features a blue ceramic dial with arabic numerals and a date window at the 3 oclock position the blue ceramic unidirectional bezel is mounted on a 435 mm stainless steel caseomega seamaster planet ocean21530442103001case size