Invicta Men's 0521 Subaqua Noma IV Collection Automatic Midsize Black Polyurethane Watch Precise 26-jewel Swiss-automatic movement; functions without a battery; powers automatically with the movement of your arm Durable flame-fusion crystal; brushed and polished stainless steel case; black polyurethane strap with stainless steel inserts Date function Black perforated dial with silver-tone hands and hour markers; luminous; black ion-plated stainless steel unidirectional bezel; screw-down crown with protective clasp; exhibition case back Water-resistant to 1,640 feet (500 M)