From the alpina seastrong diver 300 collection, this men's watch features a grey dial with a screw-down crown, a turning bezel, and a date display at the three o'clock hour in a 44. 0mm grey titanium case. Automatically generating electrical energy by the motion of your wrist, this watch stores the energy in a self-recharging battery that never needs to be changed. The tan vintage leather strap secures with a buckle clasp. Water-resistant to 300 meters, this watch includes a one-year limited manufacturer warranty.