Deep Blue 'Papa Praesto' Automatic Stainless Steel and Black Leather Aviator Watch (Model: ABPPBLUESS) 21 Jewel Miyota 8218 Automatic Movement Sapphire Crystal Automatic-self-wind Movement Case Diameter: 44mm Water Resistant 200m (660ft):in General, Suitable for Professional Marine Activity and Serious Surface Water Sports, but not Diving