Brand Rolex Model (Watch) Daytona 6 inverted Reference number 16520 Winding Automatic Case material Steel Strap material Steel Year of manufacture 1991 Excellent condition Original papers supplied, no box Winding Automatic Movement zenith el primero Case material Steel Diameter 40 mm Water resistant 10 ATM Bezel material Steel Glass Sapphire crystal Black dial No numerals on the dial Strap material Steel Strap colour Steel Folding clasp Material clasp Steel One year shop warranty