Its case and bezel are made of CuSn8 bronze - composed of 92% copper and 8% tin - a material closely linked to the history of diving. It was used in the past for the manufacture of divers' helmets or shipbuilding. Unalterable, bronze also has the ability to patina over time and depending on its environment, gaining a unique shade over the years. Evolving over time, this metal will bring its wearer beautiful shades of brown tending to red or from green to gray, giving it an authentic and unique character.