Montblanc Watch Iced Sea Automatic Date 0 Oxygen 134017. The Montblanc Iced Sea Automatic Date 0 Oxygen with gray sfumato glacier pattern dial gives the impression of looking into the depths of a glacier. Inspired by the Mer de Glace, this glacial texture was achieved using an almost-forgotten ancestral technique called gratté-boisé. The timepiece is housed in a 41 mm distressed steel case totally devoid of oxygen and comes with a unidirectional rotatable bezel with black ceramic insert lowered by laser from 0-15 minutes, a 3D engraving on the case back, and an interchangeable black rubber strap with fine adjustment system. The timepiece conforms to the ISO 6425 norm for scuba diving and comes with a water resistance of 300 meters.