Hamilton Men Khaki Navy Scuba Auto watch Made in USA or Imported Screw Down Crown, Open Case Back, Automatic Lug Width 20MM, Sapphire Crysta Water Resistance 10 bar (100 m) /145 psi (328 ft) Stainless Steel Each of the watches in Scuba line is water resistant to a depth of 100 meters and has a 41mm dial.