Assorted Models of the Lange Saxonia 1815 Tourbillon SeriesModel : 18K Rose Gold Plated Polished 316F Stainless Steel, Smooth Bezel, Assorted Dials Shown, Leather Strap with with Insignia BuckleMovement: Nickle Plated Asian Clone 2824 Automatic Movement,25J, 28800bph, Insignia Rotor,Functions: Hours, Minutes, Seconds, Exposed Balance Wheel at 12.00 as Faux Tourbillon Blue Dimensions : Dia 40 mm x 11mmMaterial : 1 piece 316F Forge Stainless Steel Casework, Thick 18K Rose Gold Plating.. 5 Mils Back : Display Caseback with Serial Engraving on Case rims... Crown : One-piece Screw down crown with o ring Crystal:Sapphire CrystalWater-Proof to 30m at Factory