Watch the automatic 21 jewel precision movement beat in the window at the 7 o'clock position of this Bulova BVA 100 Series automatic. See even more of the fascinating precision movement through the full glass exhibition caseback. Silvery white face with simple silvertone markers highlights the open window Sweep second hand - the signature of a mechanical watch - sweeps evenly around the dial rather than jumping like a standard quartze watch Luminous accents on hands and markers for low-light visibility 21 jewel automatic, self-winding mechanical movement - winds from the motion of your wrist - no batteries required. Stainless steel case and stainless steel bracelet with folding deployment buckle Curved crystal magnifies face and is scratch resistant 30 Meters water resistant (100 feet) Approximate case dimensions: width 40.5 mm (about 1.6 inches) and 12 mm thick) Backed by Bulova's 3 years manufacturer's warranty