Made in 1993 this stainless steel white dial Cosmograph ref 16520 (with full set of box and paperwork) features the rare 'upside down 6' on the hour chrono register. Its automatic movement is based on the highly respected Zenith 'caliber 400', to which Rolex performed about 200 modifications to bring it up to their rigorously high standards. Our watch is in very good original condition, and complete with the Rolex box, Daytona instruction booklet, and perforated Rolex certificate (stamped and dated March 1994). The reference 16520 was discontinued in 2001, and replaced by the current 116520 model.