Rolex Zenith Daytona Cosmograph. Stainless steel and 18k gold Oyster Perpetual Daytona Cosmograph. 40mm stainless case accented by 18k yellow gold tachymeter engraved bezel. Auto wind 36 jewel Zenith certified chronometer movement. White dial with black border around sub-zones. Special stainless steel & 18k oysterlock bracelet.