Stuhrling Original Men&#39;s Automatic Stainless Steel and Leather Casual Watch, Color Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Manual self-winding mechanical movement 23 jewels and quartz movement Features a dual time zone complication and a date window at the six o'clock position Krysterna scratch resistant crystal Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving