Model : Brushed Stainless Steel Casework, Uni directional Rotating Diver Bezel, White Dial, Lume Dot Markers and Needles , Stainless Steel bracelet with Single Foldover clasp Movement: Japanese OS Working Chronograph Quartz Movement Functions: Hours, Minutes, Secs ( 9.00 Subdial ), Date ( 12.00 Duo Window, Set via crown,, 31-01 Perpetual), 24 Hours Indicator (3.00 Subdial) Working Chronograph Start/Stop : 2.00 pusher, Rest : 4.00 pusher Minute counter : 6.00 subdial, Dimensions : Width 43mm x 12.5mmThk Material : Solid 316 Stainless Steel in Brushed finishedBack : Solid case back with Insignia and Serial Engraving Crown : One-piece Screw down crown Crystal: Sapphire Crystal Water-resistant