Rolex 6426 crown and tube advice needed

[Newboy]

I’m new to this forum today, so I apologise In advanced if my terminology isn’t correct but I’ll try my best.

I have my fathers 1970s Rolex 6426 oyster precision. It’s running ok but the crown won’t screw in, looking on a few YouTube videos I think it’s the crown thread worn, or the crown tube I think it’s called.

I feel it’s something I could take on. Just wondering if anyone could tell me what size crown and tube I would need. And where I can the parts?

I was planning on removing the case back first and removing the crown, I think it’s one screw to release the crown?

If it’s the crown tube would I be right in saying there are two or 3 screws to undue to remove the movement, then I would use an extractor to remove the tube. Any idea on what size extractor to buy? Also it looks like it could have had lock tight on. Are the tubes easy enough to remove and replace. And would this model have an o ring or seal.

Also is there an easy way to determine what part needs replacing or is it just by eye. I was thinking of purchasing the cheapest part the tube, so I can test the crowns thread on the new one. Any advice help would be much appreciated.

Chris

[jbglx]

Chris , you live in London , take the watch to a good watchmaker , or better the Rolex Service Center , remember was your father´s Rolex .

[Skop]

I have been repairing watches as an amateur for almost 20 years and I absolutely do not advise you to undertake this repair with so little experience. When you finish purchasing the necessary tools and spare parts, you will have spent the same amount that a professional watchmaker will charge you for doing a good job. As someone has already told you, it's not only a Rolex, it's your father's watch.