Swiss Legend Men's 10013A-77-BB World Timer Collection Automatic Stainless Watch with Winder Quality 18-jewel Swiss-automatic movement; functions without a battery; powers automatically with the movement of your arm Scratch-resistant sapphire crystal; brushed and polished stainless steel case and bracelet Date function Yellow dial with black hands, hour markers and arabic numerals; luminous; black bezel; world time function; screw-down crown; exhibition case back; watch winder included Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving