This is an authentic ROLEX Stainless Steel 18K Yellow Gold 40mm Cosmograph Daytona Zenith Black Inverted 6 Watch Black 16523. Originally designed for professional race car drivers, this cosmograph wristwatch is crafted of 18 karat yellow gold and stainless steel. It has a chronograph and bezel with tachymetric scale, set against a black dial. This state of the art watch features perpetual, self winding movement and precision to within 1/8 of a second. Experience true luxury with this masterpiece, from Rolex! Follow this item for alerts. Rolex is a registered trademark of Rolex. FASHIONPHILE is not affiliated with Rolex.