Marathon GSAR Unisex Anthracite Automatic Diver's Watch - US Gov 41mm IP Black Rubber. Hand-assembled with a durable black anti-reflective Ion-Plating (IP) armor on its 316L Stainless Steel case and movement. Specifications for Marathon GSAR Unisex Anthracite Automatic Diver's Watch - US Gov: Manufacturer: Marathon Application: Outdoor Gender: Unisex Dial Color: Black Band/Strap Color: Black Case Color: Black Color: Black Case Finish: Anthracite Case Material: 316L Stainless Steel Case Diameter: 41 mm Band/Strap Material: Rubber Wrist Band Type: Strap Movement: Anthracite Sellita SW200-1 with Incabloc Shock Absorber Water Resistance Level: Waterproof Water Resistant Mark: 30 atm Package Contents: Marathon GSAR Unisex Anthracite Automatic Diver's Watch - US Gov Marathon WW194006BK-0030: GSAR Unisex Anthracite Automatic Diver's Watch - US Gov 41mm IP Black Rubber