Model : Sheen Finished Stainless Steel Case, Uni Directional Diver Bezel, Black Dial, Lumes Arrow Markers AntiDust Quality Rubber Strap with Insiginia Tang BuckleMovement: Nickel Plated Asia 2824 Automatic Movement , 25J, 28800bph, Rose Gold Plated Insignia Rotor Functions: Hours, Minutes, Secs, Day at 4.30 ( Set via Crown) Dimensions : Dia 40mm x 10mm Thk Material : 1 piece forged case construction, solid 316 Steel Back : Solid case back, Detail Serial Engraving Crown : One-piece Screw down crown with o ring Crystal: Sapphire crystal, AR coatedWater-resistant