This is an authentic IWC 18K White Gold Alligator 45mm Portofino 8 Days Chronograph Manual Winding Watch Slate IW515103. The watch is crafted of 18 karat white gold and features a slate dial with silver hour markers, date display, power reserve indicator, sapphire crystal, brown alligator strap, and a manual winding movement. Follow this item for alerts. IWC is a registered trademark of IWC. FASHIONPHILE is not affiliated with IWC.