I'm very impressed with the procedure you used- truly it is the best method of restoring these. Your jig for holding the tube while machining the case-inserted portion was genius too! So the question is, did you make several hundred more tubes for all your new friends? ;-)
Top marks from me - very impressive indeed, I've not seen anybody else do this fix properly before. Now you've perfected the process, how many hours work would there be to make and fit a new tube in another 7040 case?
Thanks feca67. Depending on the condition of the case, tube, etc., I would estimate 2-4 hours to prep the case, turn the part and press it in. One of the things I am not sure about is the tolerance requirements for the tube and case interface to create a truly waterproof seal. I created a part that is a couple thousands different from the case and it is a tight enough fit to be completely functional, but watertight at pressure is a different issue.
Aaaahhhh. Thanks for the photos. I will take a look at my 6105 project watch and see what the bezel interface to the 6309 case looks like. i will say right out of the shute that a coin edge will be a pain in the "caseback" to produce by hand, but a CNC set up would make quick work of it. I would have to outsource this aspect. Just thinking outloud. I will give it a looksee and give it some thought.