Montblanc 1858 Iced Sea Automatic Date 41mm Watch Earrings The adjustable lobster claw clasp 23 ctw in round The adjustable lobster claw clasp allows the necklace to be worn at either 16” or 18” Water Resistance: Designed to withstand pressures equivalent to a depth of 30 meters or 100 feet 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 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