The crystal seals on the case like any other tension ring crystal does.
The crown has a seal that contacts the case tube.
So it's pretty simple - make sure that the crystal is correct for the watch, that it is in good condition, and that it is installed properly. Also make sure that the sealing surface that the crystal mounts to in is good condition. If it has the style that the bezel goes over the crystal, then make sure that fits snugly.
Next, make sure that the case tube is not worn out - a lot of these used brass tubes originally and they are often worn - I replace a lot of them to say the least...
If worn replace with the newer stainless tube Omegas supplies for these. Then install a fresh crown, and that's it.
Of course pressure test (dry test ideally) to confirm.
The reason you aren't finding anything is that there's nothing special about these, just regular watchmaking work and they are typically fine.
Generally the reason so many of these watches have good dials and movement, is because these cases do protect very well.
Thanks thats helpful, I will pay attention to the crystal. Unfortunately I currently have a rather flimsy third party crystal on the watch. Would getting an original be worth it in your opinion, they seem to be somewhat difficult to get?
And I was asking about the crown because I could not find a seal that goes in the crown. But I think I might have found one. Is this item a seal for the crown, and if it is, could I not simply replace that in the crown, rather than buy a new crown?
550.1103 CROWN WHEEL SEAL
Thanks!
It would be helpful if you could provide the case number and the material, as I can give you some part numbers...
If the crystal has the right size and features (like the recess on the tension ring for the dial) then you can certainly use generic. But original Omega crystals are all that I use personally.
That is a crown wheel seat...not seal. Omega generally does not sell O-rings for crowns that are not screw down crowns (even some of those they don't sell seals for) so the normal method of handling this is a new crown. Of course if you can figure out the size, then you can try to remove the washer that holds the O-ring in place, swap the O-ring out, then somehow fasten that washer back in place - in most cases the seal cross section is larger than the gap between the crown post and the washer, so you can't just dig it out and put a new one in without potentially damaging that new seal.
