Brand, Seller, or Collection Name:Casio Model number:GST-W310D-1AJF Part Number:GST-W310D-1AJF Model Year:2017 Item Shape:Round Display Type:Analog and digital Case diameter:49.3 millimeters Case Thickness:15.3 millimeters Band Material:Stainless steel Band Color:Silver Dial color:Black Special features:Stop watch, World time, Timer Item weight:6.40 Ounces Movement:Quartz