GV2 3402 Triton Men's Black Dial Calfskin Leather WatchGV2 Swiss Automatic Movement Triton Collection49 mm Round IPRG Case/Black Dial/White Index, Screw down crownPrecision Twin spinning Rotors Mounted on side of the caseSwinging lower lugs and rotating turbine visible on case backCalfskin Black Leather Strap with Tang BuckleAnti-reflective Sapphire CrystalWater Resistant to 50 Meters/5ATMSwiss Automatic Mechanical Movement