Movement Automatic, Cal. 4R36, 24 Jewels 21,600 vibrations per hour, PR 41 Hours Glass Hardlex Crystal Band Stainless Steel Clasp Three fold clasp with secure lock, push button release with extender Case Stainless Steel Diameter 44.3 mm without Crown Thickness 12 mm Dial Color Blue Unidirectional Bezel Luminous Hands Markers Screw Down Crown Screw Case Back Water Resistant 200M diver's Day-Date Display