Bezel Material: Stainless Steel Bezel Function: Fixed Mass: 188.0 g Water Resistance: 30m / 100ft (unsuitable for prolonged contact with water e.g. swimming, bathing) Crown Material: Stainless Steel Screw-down Calendar: Automatic Date at 6 Power Reserve: 44-hour power reserve Watch Bracelet / Strap Material: Alligator leather - Black Watch Clasp Material: Stainless Steel Deployant Max Wrist Size: 8.0 Watch Strap Width: 17.75 - 24.0 mm Limited/Special Edition: Limited edition of 3000 watchesDa Vinci Subseries: Perpetual Calendar Style (Gender): Men's Case Material: Stainless Steel Dial Color: Silver Movement: Automatic Engine: IWC Calibre 79261(28,800vph, 39 jewels) Functions: Hours, Minutes, Chronograph, Date, Perpetual calendar, Four-digit year display, Perpetual moon display, Small hacking seconds hand, Crown-activated rapid calendar advance, Crystal Material: Sapphire Crystal, double-coated, convex, pressure-drop resistant Case Length: 51.0 mm Case Width: 43.1 mm Case Thickness: 14.4 mm Caseback: Stainless Steel with Engraving of Kurt Klaus