U-Boat Men's 'Thousands of Feet' Mechanical Hand Wind Stainless Steel and Leather Sport Watch, Color:Black (Model: 1088) Displays hours, minutes with separate seconds dial at 3. Mechanical hand-winding with an Incabloc shock absorber and visible rubies. Two superimposed dials, high quality sapphire and 8 steel external screws to lock case. Powered by 25 jewels with 28800 vibrations per hour. Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving