For sale is a rare Rolex Cosmograph Daytona Ref. 16520 from the coveted A series - the last production cycle with the legendary Zenith El Primero caliber. The watch impresses with its classic black dial, sharp case edges, and original Oyster bracelet. A true collector's item with increasing value potential - not just for enthusiasts of the Daytona series, but for anyone who wants to wear watch history on their wrist.