Citizen Promaster Marine Automatic is a robust ISO-rated diver's watch designed for underwater use and daily wear, featuring a 42 mm stainless steel case and a reliable automatic movement. Key attributes: Black | Steel | Stainless steel | Diver's ISO water resistance (200 m) | Automatic movement | Rubber strap with steel closure | Black dial | Mineral crystal | Dimensions & fit: Case diameter: 42 mm | Composition & care: Stainless steel case | Mineral glass | Rubber strap | Stainless steel closure | Wipe clean with a soft cloth. Rinse with fresh water after saltwater exposure. Avoid solvents and prolonged exposure to extreme temperatures.