Brand : SEIKO Gender : Man Driving systems : Automatic 24 Jewels Hand and automatic winding capabilities Caliber : No.4R36 21,600 vibrations per hour Power reserve approximately : 41 hours Case : Stainless Steel Case back : Screwdown Caseback Crown System : Screw down Crown Glass material : Hardlex Glass Dial color : Black Bracelet : Rubber strap Clasp : Buckle LumiBrite : Hands and Markers Display : Analog With Day and Date display Water resistant : 200M / 20 ATM Case diameter : 45 mm (without crown) Case thickness : 14 mm Lug Width : 22 mm Unidirectional Rotating Bezel