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Hello. In my quest to see if a CNC file of the 5513 case can be made and then it would simply be a matter of sending the file to an online 5 Axis CNC service like 3d Hubs, I was wondering if anyone knows the purpose of the multiple dimensions you see on the inside of the case radius. The Green Arrow is obvious. These threads are for the caseback to screw into. Thanks to an Italian watch maker who does repairs, he shared with me that the thread size of the 5513 (and I assume 1680) is 31mm diameter, .5 pitch and the standard 60 degree thread profile. But why do we see multiple threads/surfaces in the red area? I'm assuming that the reason for these other thread looking parts is that in order to to create the nesting surface for the 15XX movement (the perimeter you see that has the half moon cut out to slide the movement holding screws into) they had to continue using a die/thread cutter. In other words, all of these extra looking threads is only because they made the rolex cases on a lathe, they did not have 5 axis CNC machines. Am I correct? So if we want to just make a CNC file, we just need the movement holding space, the threads for the caseback, and of course the inner smallest diameter to hold the dial? Is my thinking correct? Thanks for any help. If I succeed in making a 5513 CNC file for the midcase and maybe even the caseback, this will help us get cheaper cases. But these would be sterile.

RickFlorida, I not only raise my hat to you, but will also bow to the depth of dedication you have devoted towards achieving a 1:1 case! I have been following your posts on this from the very beginning, but have never answered to any of them as I had nothing to offer in terms of helpful information.The intricate details of your aim in this project has definitely enticed me down in your list of potential buyers! This forum has been Gods gift to the internet not just because of horological interests but above all; the members that are part of it, bringing the best of society from all walks of life! I understand with appreciation the difficulties you have faced and to invest a sensible and feasible amount of funds is paramount, which would otherwise defeat the purpose of the whole outcome! Your quest to find the data on thread pitch etc, etc, has been a lot of work! Ideally it would have been easier to purchase the cheapest genuine 1680 or 5513 possible, perhaps in the worst condition and study the full details of the case having it properly calibrated to get the right data and then be done with it! One could have easily sold the genuine and recuperated all the money back and perhaps even made a profit on it! The other option would be to get your Italian watchmaker to do it for a token of appreciation! I find That most Italians I have met In my lifetime can be very obliging and helpful ! Good luck and again I applaud y

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My first genuine Rolex... I like the watch. I hate the stigma. It's a conflict. One thing's for sure, I do like it on an MN strap. I think I'll try rubber