Water resistant to 200 m (660 ft.)</br>Screw-down crown</br>Japanese-quartz Movement</br>Case Diameter: 37mm</br>Diver's 200m (660ft) watch:?in general?? suitable for high-impact water sports and scuba diving at depths not requiring mixed-gas</br><br/>http://www.amazon.com/gp/product/B01N8PG9I1