Brand, Seller, or Collection Name:Casio Model number:GST-W130BC-1AJF Part Number:GST-W130BC-1AJF Model Year:2018 Item Shape:Round Display Type:Analog and digital Case diameter:5.2 centimeters Case Thickness:16.1 millimeters Band Color:Black Dial color:Black Special features:Timer, Stop watch, World time Item weight:3.68 Ounces Movement:Quartz