Model : 18K RG Plated SS Case, Black Dial, Black subdials, Orange Numeral Markers on Leather Strap with Insignia Buckle Movement: Japanese OS 10 Working Chronograph Quartz movement, Functions: Hours, Minutes, Seconds : Running Secs at 12.00 subdials Date : Adjustment via crown, Chronograph : 6.00 subdial - minute counter, 3.00 subdials, hour counter 8.00 pusher - start/stop chrono, 10.00 pusher - reset Dimensions : Dia 43mm x 18mm Thk Material : 1 piece forged case construction, solid 316 stainless steel< 18K Thick RG Plating .. 3 mils Back : Solid case back with Detailed Engraving Crown : One-piece solid screw-down crown with o ring Crystal: Synthetic Sapphire Water-resistant