Model : PVD Black Coated Brushed Stainless Steel Caseset, Satin Finished Stainless Steel Tachymeter Bezel, Grey / Black dial, Black Subdial, on Rubber Strap (Anti Print Quality) with Single Fold Deployant ClaspMovement: Japanese OS 20 Quartz Chronograph Movement Functions: Hours, Minutes, Chronograph (Activated by 11.00 and 1.00 Pushers), 24 Hour at 12.00 Subdial, Date (Set by Crown at 12.00) Dimensions : Dia 45.5mm x 17mm Thk Material : 1 piece forged case construction, solid 316 stainless steel, Thick PVD Black Coating Back : Solid Insignia Caseback Crown : One-piece solid pullout crown with o ring Crystal: Sapphire Crystal Water-resistant