Montblanc’s first sports dive watch, the Montblanc 1858 Iced Sea Automatic Date, features a dial with a “glacier” pattern that gives the impression of looking into the depths of a glacier. This black dial with “glacier” pattern is inspired by the Mer de Glace (Sea of Ice), the main glacier of the Mont Blanc Massif. Its texture was achieved using an almost forgotten ancestral technique called gratté-boisé. The timepiece features a unidirectional two-tone ceramic bezel, an engraved case back, and an interchangeable black rubber strap with fine adjustments. The timepiece complies with the ISO 6425 standard for diving watches and is water resistant to 300 meters.