Features OF THE rolex submariner, bLUE luminescence, the Chromalight display on the dial is an innovation that pushes the boundaries of visibility in dark environments. Its engraved 60-minute graduations allow a diver to accurately and safely monitor diving time and decompression stops. At home in the oceans, where it remains an indispensable instrument for every diver, the Submariner has also conquered terra firma as the watch of action with a rugged elegance of its own. Oyster, 40 mm, Oystersteel, submariner Date. Oyster, 40 mm, Oystersteel. Features OF THE rolex submariner, unidirectional rotatable bezel.