Brand: Invicta Model number: 17939 Part Number: 17939 Model Year: 2011 Item Shape: Round Dial window material type : Synthetic sapphire Display Type: Analog Clasp: Buckle Case material: Stainless steel Case diameter: 5.1 centimeters Case Thickness: 12 millimeters Band Material: Silicone Band length: Men's Standard Band width: 30 millimeters Band Color: Black Dial color: Black Bezel material: Stainless steel Bezel function : Stationary Calendar : Date Special features: Chronograph Movement : Japanese quartz