I have one of these, bought it from MBW a few months ago. The case is superb and is perfect for every Subariner no-date project, if it is a Rolex Sub no-date or a Tudor Sub no-date. I still need to figure out if a MBW Rolex Sub no-date will fit on this case so i can change it into a 5512 or 5513, but due to lack of funds it's sitting still in the watchbox. To be honest... maybe i'll have to sell it as watchfunds won't come in real soon...
Look at the height of the crown in the case
Here's a picture of my blue dialed Tudor Submariner no-date 7928 (small rose)