Specifications GV2 3401 Triton Men's Black Dial Calfskin Leather Watch GV2 Swiss Automatic Movement Triton Collection 49 mm Round Gun Metal Case/Black Dial/White Index, Screw down crown Precision Twin spinning Rotors Mounted on side of the case Swinging lower lugs and rotating turbine visible on case back Calfskin Black Leather Strap with Tang Buckle Anti-reflective Sapphire Crystal Water Resistant to 50 Meters/5ATM Swiss Automatic Mechanical Movement