Precision instead of COSC
The Rolex Oysterdate collection has been produced since the 1950s and was discontinued at the end of the 1980s. One of the characteristic features of these models is their hand-wound mechanism, which was otherwise only available in the early Daytona references until the introduction of Ref. 116520 in 2000. Additionally, the collection does not have COSC certification, which is why you will find "Precision" lettering on the dial of Rolex Precision Oysterdate watches. This is highly sought after by collectors.
The most famous reference is the Rolex Oysterdate 6694 with a diameter of 34 millimetres. Contrary to some assumptions, there is no 36-millimetre Rolex Oysterdate. This size was reserved for the Datejust.