Model 116528... Upgraded to Superlume Dial !!!! Model : 18K Champagne Gold Plated Polished 316 Stainless Steel Caseset, Black Dial, Gold Subdials, Suplerlume Stick Markers and Needles on 18K Champagne Gold Plated SS Bracelet with Double Locking Clasp, Engraved Rehaut with M 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, 18K Champagne Gold Plating.. 5 mils Back : Close case back with Hollogram Crown : One-piece Screw down crown with o ring Crystal: Sapphire crystal with laser etched crown at 6.00 Model No and Serial number engraved in lugs at both endsWater-resistant