Combining All The Elements You Would Expect In A Sports Watch, This Model Is A Timepiece You Can Rely On – On, In Or Under The Water. Impressive Water-Resistance Up To A Pressure Of 30 Bar (300M/1000 Ft) Is Combined With The Energy Of A Swiss Made Quartz Movement. With A Screw-Down Crown And Case Back And Superluminova ® Ensuring It Is Readable In The Dark, The Seastar 1000 Quartz Gmt Is An Aquatic Ace That Truly Has It All. The Screw-Down Crown Also Offers Additional Protection Against Knocks.