Brand New Authentic IWC Portugieser Perpetual Calendar Automatic Blue Dial 18K Rose Gold Leather Strap Men's Luxury Watch Model IW503312. Brushed and Polished 18K Rose Armor Gold case with Blue Alligator Leather strap. Rose Gold Folding clasp. Smooth bezel. Dial description: Polished Rose Gold Tone Hands and Arabic Numeral Hour Markers with Minute Markers Around the Outer Rim and 4 Sub-dials on a Blue dial. Swiss Automatic movement. Chronograph sub-dials display: Moonphase, Month and Day of the Week, Date, Seconds. Calendar: Perpetual Calendar. Powered by IWC 52611 Calibre engine with 168 hours power reserve. Watch functions: Hour, Minute, Second, Date, Day, Calendar, Power Reserve, Moonphase. Screw Down crown. Scratch Resistant Sapphire crystal. Unique case shape. Case size: 44.20mm. Case thickness: 14.90mm. Transparent case back. 30 Meters - 100 Feet water resistant. 2-year WatchMaxx warranty. Also known as model: 503312.