So for the process you definately need a drill press and a good drill vice to make certain nothing moves. After that its measure, align, measure, align measure align. I will drill the lugholes with a 1,2mm drill to see how well the springbars fit and have the option to redrill to 1,25mm. I would recomment to disassemble the watch for this process.
for a crown tube of original dimensions you need a 2,65mm drill and a M3 x 0,35 hand drill tap. Dont forget lubrication.
i am not sure jet if i shoult countersink the tube because i really like this look
I sometimes get people PMing me, asking for a vintage Rolex build - a gen' spec' 1:1, water proof 1665/1675/1016 etc with glow in the dark lume, for a budget of $750 maximum and it needs to be ready in 2 weeks for his cousins/bosses/best buddies wedding. Obviously, if done properly, these things...
forum.replica-watch.info
For a crown i brought a "Aftermarket 24-600 Crown and tube" from athajavintage (I am not sure if i am allowed to post links here but google will help you out) It says it will fit a cartel case so i assumed original measurements even if the crown tube pitch on the webside does not to seem ISO fine threaded.
For the crown itself it seems pretty good quality wise and the coronet also seems to have the right dimensions. seals look good too. But right now i really cant recall why i brought that specific one except i was a little disapointet over the shape of a raffles 5,3mm crown.
ill probably drill over easter because i visit my family and have access to drill press and a lathe there. Ill be sure to take some pictures of the process.
also if anyone knows a good place to get springbars id apreciate it. I found a pretty good ebay shop in the US but they only have the longer ones that were used in subs and GMTs