Spinnaker Men's SP-5005-01 Helium Analog Display Japanese Quartz Black Watch The unique Helium collection from spinnaker is powered by a Japanese quartz movement and features a date window. Yet the most striking aspect of this watch is its Helium release valve which adds depth and safety to its water resistance Molded silicone strap with stainless steel buckle. Water resistant to 300 M (985ft). unidirectional turning bezel Japanese-quartz Movement Case Diameter: 46mm Water Resistant To 984 Feet