Isobrite Swiss Automatic . There Are 60 Tritium Tubes On The Dial To Mark Each Minute/second 3 Tubes On The Hands And One Tube On The Unidirectional Diver Bezel To Keep Track Of Elapsed Time. Equipped With A Reliable And Proven Eta 2824-2 Swiss Automatic Movement The Watch Does Not Need A Battery To Power The Movement Or The Illumination. Constructed Out Of 316l Stainless Steel And Protected By A Scratch-resistant And Anti-reflective Sapphire Crystal This Watch Feels Solid Rugged And Utterly Comfortable. From Dressy To Diving To Night Activities There Is No Need To Swap Out Watches. Moreover The Screw Down Crown Ensures A Water Resistance Of 300m (990ft) Perfect For Diving Into The Deep. The Watch Also Features An Exhibition Caseback To Allow You To Enjoy The Workings Of The Mechanical Movement. Specifications for Isobrite Swiss Automatic: Manufacturer: Isobrite Gender: Unisex Band/Strap Material: Rubber Wrist Band Type: Strap Package Contents: Isobrite Swiss Automatic