Model 116520... Upgraded to 316F Steel and New Blue Superlume Dial !!!! Upgraded to more refined casework and Invisible Etched Crown on Crystal !!! Calibre 4130 Movement Bridges and Engravings as per Genuine !!! Model : Polished 316F Stainless Steel Caseset, White Dial, Silver Grey Subdials, Blue Superlume Stick Markers and Needles on Leather Strap with Double Locking Single Fold OverClasp, Engraved Rehaut with Alpha Numeric serial numbers Movement: Asia 7750 Valjoux Working Chronograph movement, 28800bph, Engraved Rotor, New Improved 29J Version, Modded to Calibre 4130 Movement BridgesFunctions: 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 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