Model : PVD Black Coated Brushed Stainless Steel Engineered Case, Brush Finish, PVD Coated Fixed Tachymeter Bezel, Black Dial, White Ring subdial, on Black leather Strap with Single Fold Over Insignia Clasp Movement: Japanese OS 20 Quartz Chronograph Movement Functions: Hours, Minutes, Seconds : Running Secs at 6.00 subdials Dimensions : Dia 44mm x 15.5mm Thk Material : 1 piece forged case construction, solid 316 stainless steel, Thick PVD Black Coating. Back : Solid Case Back in Checker Flag Graphic with Detailed Serial Engraving Crown : One-piece pull out screw-down crown with o ring Crystal: Sapphire crystalWater-resistant