Baume & Mercier Men's 8781 Riviera Two-Tone Automatic Watch Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal Superluminova Coated Hour Markers and Indexes and Hour, Minute and Second Hands; Stainless Steel and Yellow Gold Two Tone Case and Bracelet with Yellow Gold Crown Black PVD Unidirectional Rotating Bezel with 60-minute diving scale Water resistant to 660 feet (200 M): suitable for recreational scuba diving