The calender date disc is not moving correctly on a Rolex Oyster Date Precision (datejust ref.6694 cal.1215 The date on the calendar wheel only shows in between dates in the date window, it also seems to be moving only about 3/4 of a turn each 24 hours. It looks like the notch on the driving wheel isn't correctly contacting the teeth on the datewheel. How can I get the date to align correctly?, could the driving wheel be worn to much or is there something else that's more likely?.