Model : SS Case, Black dial, Black Subdials, White Roman Numeral Markers complete with Anti Dust Rubber Clad Bracelet .. Double Deployant with release catch.. Unidirectional rotating Bezel Movement: Japanese OS 20 Quartz Chronograph Movement Functions: Hours, Minutes, Chronograph, 24 Hours Indicator (3.00 subdial) Chronograph : 9.00 subdial - Minute Counter 2.00 pusher - start/stop chrono, 4.00 pusher - resetDimensions : Width 47.5mm x 17.5mm Thk Material : 1 piece forged case construction, solid 316 stainless steel Back : Solid Case Back with Detail engraving Crown : One-piece Pull out crown with o ring Crystal: Synthetic Sapphire, Double Sided AR coated Water-resistant