Gent's 18K Rose Gold 42mm IWC Portuguese "Perpetual Calendar" Power Reserve Automatic Item #: CT41031 Brand: IWC Model: Portuguese Perpetual Calendar Moonphase Reference No: IW5022-13 Gender: Gent’s Movement: Handmade Swiss Automatic Movement Visible Through Sapphire Exhibition Caseback (Calibre 51613) Case Measurements: Case Diameter: 42mm Case Thickness: 15.5mm Water Resistance: 30m / 100ft Power Reserve: 168hr / 7days Dial: Silver Markers: Rose Gold Arabic Numerals Bracelet / Strap: Brown IWC Crocodile Strap with 18K Rose Gold IWC Deployant Clasp Features: Rose Gold Feuille-style Hands, Arabic Numerals, Subsidiary Seconds Hand, 18K Rose Gold Smooth Bezel, Full Perpetual Calendar Functions with Day, Date, Month Counter, Year Indication, Moon Phases - "Single Moon", Power Reserve Subdial, Sapphire Crystal.