Sentinel Watch ,Features matte gray finish 316L stainless casing and unidirectional ratcheting dive bezel. Black 24mm silicone strap with heavy duty buckle. Scratch and chip-resistant mineral glass crystal with anti-reflective coating. Swiss three hand movement. Phosphorescent hour and minute hands; markers on second hand and bezel. Dial features 12/24 hour markers and easy to read date window. Water resistant to 100 meters; screw down crown. Instructions for using dial as a compass on the underside of the strap. Engraveable stainless screw-in caseback. 45 month battery.