The Montblanc 1858 Iced Sea Automatic Date 129373 is a diving watch featuring a green glacier-patterned dial inspired by the Mer de Glace glacier. The 41mm stainless steel case houses an automatic movement and is complemented by a unidirectional bi-color ceramic bezel. The watch includes an interchangeable stainless steel bracelet with a fine adjustment system. It conforms to the ISO 6425 standard for diving watches and offers water resistance up to 300 meters. Reference number: 129373.