Citizen Automatic Classic is a 40 mm automatic wristwatch that pairs a sunburst blue dial with a stainless steel bracelet. It highlights a mechanical Cal. 8210 movement and an exhibition screw-down case back for everyday wear with a classic look. Key attributes: Blue | Steel | Stainless steel | Water resistance 5 ATM | Automatic movement (Cal. 8210) with ~40-hour power reserve | Mineral crystal | Date display | Double safety clasp on bracelet | Exhibition (transparent) screw-down case back | Sunburst blue dial | Round 40 mm case | Three-hand layout with date window | Dimensions & fit: Case diameter: 40 mm | Case thickness: 13 mm | Weight: 125 g | Composition & care: Stainless steel | Mineral glass | Wipe with a soft cloth. Avoid contact with chemicals and strong impacts. Have the movement serviced by an authorized service center.