Victorinox Swiss Army Men's 'AirBoss Mach 6' Automatic Stainless Steel and Leather Sport Watch, Color:Black (Model: 241188) Chronograph 12hr, 30min, 60 sec Tachymeter scale, 46 hour power reserve Anti-reflective sapphire crystal Case diameter: 45 mm Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving