Seiko Speedtimer 6R Compact Countdown Grey-White Automatic Dive WatchThe sleek Speedtimer blends classic dive heritage with a modern, compact silhouette. Its 6R55 automatic movement delivers precise timing and a threeday power reserve, while the curved sapphire crystal showcases a dazzling greywhite dial. A sturdy superhard coated stainless steel case, only 12 mm thick, keeps you comfortable on any adventure. Water resistance to 200 m ensures you stay on time, even underwater. Case Diameter 39. 5 mm Case Thickness 12.