Model : 2015 Basel release model....18K RG Plated Case, Black Ceramic Tachymeter Bezel, Black Dial, Rose Gold Subdials, Stick Markers on 2014 Black Rubber Strap with Double Locking Clasp, Engraved Rehaut with M serial numbers Movement: Asia 7750 Valjoux Working Chronograph movement Functions: 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 Thick RG Plated... 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