Premium Quality Casework, Dial with Superlume and Bracelet, Invisible Etched CrownModel : 18K Rose Gold Plated Polished 316F Stainless Steel Caseset, Black Ceramic Bezel, Brown Dial and Subdials, Black Arabic Numerals, Suplerlume Needles on Black or Brown Leather Strap with Single Fold Clasp, Engraved Rehaut with serial numbers Movement: Asia 7750 Valjoux Working Chronograph movement, 28800bph, Engraved Rotor, New Improved 29J VersionFunctions: Hours, Minutes, Seconds : Running Secs at 6.00 subdials, Chronograph : 3.00 subdial - minute counter, 9.00 subdials, hour counter 2.00 pusher - start/stop chrono, 4.00 pusher - reset Dimensions : Dia 40mm x 13mm Thk Material : 1 piece forged case construction, solid 316 stainless steel, Thick 18K Rose Gold Plating .. 5 Mils Back : Close case back Crown : One-piece Screw down crown with o ring Crystal: Sapphire crystal with Invisible laser etched crown at 6.00 Model No and Serial number engraved in lugs at both endsWater-resistant