Model : 18K Rose Gold Plated Polished SS Case, Black Dial, Rose Gold Roman Numeral markers Leather Strap with Insiginia Tang BuckleMovement: Asia 2813 Modified Automatic Movement with Functional Power Reserve Functions: Hours, Minutes, Secs, Date and Week No at 6.00 Subdial ( Set via Recess Pusher at 4.00), Functional Power Reserve at 12.00 Subdial, Day will advance daily when watch is in operation, Week No needs Manual Setting via recess Pusher Dimensions : Dia 42mm x 11.5mm Thk Material : 1 piece forged case construction, solid 316 Steel, Thick 18K Rose Gold Plating .. 5mils Back : Display case back, Detail Serial Engraving Crown : One-piece Screw down crown with o ring Crystal: Synthetic SapphireWater-resistant