The Montblanc 1858 Iced Sea Automatic Date with grey glacier pattern dial gives the impression of looking into the depths of a glacier with all its minerals captured in time for millennia. Inspired by the Mer de Glace, this glacial texture was achieved using an almost-forgotten ancestral technique called gratté-boisé. The 41mm timepiece comes with a black interchangeable rubber strap with grey outline which can be quickly and easily switched for a stainless steel bracelet without the need to return to the boutique or the use of any tools. It is also adjustable on the wrist when wearing the watch for diving. The timepiece conforms to the ISO 6425 norm for scuba diving and comes with a water resistance of 300 metres and features luminescent markings for reading in low light.