ROLEX DEEPSEA.

Oyster Perpetual Rolex Deepsea in Oystersteel, with black ceramic bezel and Oyster bracelet.
It features a unique black dial and large luminescent hour markers. Water-resistant to a depth of 3,900 meters and featuring a 60-minute graduated unidirectional rotating bezel, the Rolex Deepsea is one of Rolex's ultra-resistant diving watches designed for deep sea exploration.