Fortis Men's 'B-42 Marinemaster Chronograph' Automatic Stainless Steel and Leather Sport Watch, Color:Black (Model: 671.10.41L.01) Sapphire crystal with anti-reflective coating on both sides Fine timing device and incabloc shock absorber 28.800 semi-vibrations per hour Screw-down case back Water resistant to 660 feet (200 M): suitable for recreational scuba diving