Fortis Men's 'B-42 Chronograph' Automatic Titanium and Leather Sport Watch, Color:Black (Model: 638.28.71L) Sapphire crystal with anti-reflective coating on both sides Fine timing device and incabloc shock absorber 28.800 semi-vibrations per hour Blue afterglow effect in the darkness Water resistant to 660 feet (200 M): suitable for recreational scuba diving