Spinnaker Men's SP-5005-08 Helium Analog Display Japanese Quartz Black Watch This simple yet refined watch from the Helium collection is powered by a Japanese quartz movement. Its most unique feature however is its Helium release valve that add depth and safety to its water resistance Molded silicone strap with stainless steel buckle. Unidirectional turning bezel. Water resistant to 100 M (330ft) Japanese-quartz Movement Case Diameter: 46mm Water Resistant To 984 Feet