Model : PVD Black Coated SS Case, Black Ruby Bezel, Black Dial, Black Ring Subdials on Rubber Strap with Insignia Tang Buckle Movement: Japanese Quartz OS10 Chronograph movement Functions: Hours, Minutes, Seconds : Running Secs at 6.00 subdials, Chronograph : 9.00 subdial - minute counter 2.00 pusher - start/stop chrono, 4.00 pusher - reset Date ( at 12.30 set via crown) Dimensions : Dia 47mm x 14mm Thk Material : 1 piece forged case construction, solid 316 Steel, Thick PVD Black Coating Back : Solid case back with Detail Engraving Crown : One-piece Screw down crown with o ring Crystal: Synthetic Sapphire Water-resistant