The Rolex Certified Pre-Owned Datejust II is presented in a 41mm white Rolesor case with a black dial with Roman numerals and an hour marker at 9. It features a fluted bezel. Worn on an Oystersteel Oyster bracelet, it is driven by the automatic Calibre 3136. The Datejust of 1945 was the first self-winding chronometer wristwatch to show the date in a window; the Datejust II carried the design into a larger 41mm case. It is waterproof to 100 meters.