Model 116520... Upgraded to 316F Steel and Superlume Dial !!!!
Model  :  Polished 316F Stainless Steel  Caseset, Black Dial, Silver Subdials, Suplerlume Stick Markers and Needles on 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 Version
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
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 ends
Water-resistant