The Montblanc Iced Sea Automatic Date 129371 is a diving watch featuring a black glacier-patterned dial inspired by the Mer de Glace, achieved through the gratté-boisé technique. It has a 41mm stainless steel case, a unidirectional bi-color ceramic bezel, and a tapered interchangeable stainless steel bracelet with fine adjustment. The watch is water-resistant up to 300 meters and conforms to the ISO 6425 standard for diving watches. Reference number: 129371.