Brand, Seller, or Collection Name:Casio Model number:EFR-539BK-1A2VUDF (EX204) Part Number:EFR-539BK-1A2VUDF (EX204) Item Shape:ROUND Dial window material type:Mineral Display Type:Analog Case diameter:5.4 centimeters Case Thickness:11.70 Band Material:Stainless Steel Band width:26 millimeters Band Color:BLACK Dial color:Black Special features:Chronograph Item weight:9.60 Ounces Movement:Quartz Water resistant depth:200 Meters