Alpina Women's 'Extreme Diver' Swiss Quartz Stainless Steel and Rubber Diving Watch, Color:Black (Model: AL240LBO3V6) Brushed and polished stainless steel case (38 mm in diameter, 10 mm thick), screw-down case-back, unidirectional rotating bezel, black dial, silver-tone luminescent hands and hour markers, date window at the 3 o'clock position, scratch resistant sapphire crystal, screw-down crown Swiss quartz movement, caliber al-240, water resistant to 30 M/300 M/984 feet, black rubber strap, pin buckle, Swiss made, AL240LBO3V6 al-240lbo3v6 Swiss-quartz Movement Case Diameter: 38mm Water Resistant To 984 Feet