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Omega 166.020 crystal replacement advice needed - Seamaster De Ville

  1. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    Hi All,

    I would just like to ask for some help regarding the replacement of the crystal for this reference. I have some experience as a hobbyist tinkerer with watches however, I have no previous experience with this unicoc case (yes, I know, I should start with something less valuably, haha).

    Admittedly and embarrassingly, I attempted to do this on my own after spending a while investigating and trying to get it to work. It just wouldn't work. I was starting to get frustrated. I think we all know what happens when we get frustrated...not good! I completely shattered the crystal. Maybe I was using a dye that was too small compared to the size of the crystal? I should have stopped but I just wanted to get it done. This happened a few weeks back - now that it's been off my mind for a while and that I'm finally over the fact that I destroyed an original Omega crystal, I can finally bring myself to ask for some advice.

    I know it would be best to have it taken to a watchmaker, but I would honestly like to learn how to do it for myself. I also like the sense of accomplishment that you get when you can repair something on your own!

    The parts I have:
    - Case ref. 166.020
    - Part no. PZ 5072 (please advise if you believe this is not the correct part no.)

    The equipment that I have:
    - Bergeon crystal lift
    - Caseback/Cyrstal press

    IMG_8836.jpg


    IMG_8838.JPG

    The watch currently has a horrible generic crystal fitted. You may also see that the steel ring is not part of the crystal - it is currently sitting on the dial (removed when trying to fit the PZ 5072 of course). Interestingly, that silver ring is a complete circle unlike the tension ring. The PZ 5072 comes with its own tension ring which was giving me a hard time installing it.

    IMG_8837.jpg
    And here's one for you all to laugh at! ::shy:::unsure: ::facepalm1::Mistakes happen, but that's how we learn.

    Sincerely appreciate all the help and advice from all. Look forward to reading your comments!

    Best,
    Chris
     
  2. Archer

    Archer Omega Qualified Watchmaker Feb 12, 2020

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    063PZ5072 is the correct crystal.

    Cheers, Al
     
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  3. janice&fred

    janice&fred Feb 12, 2020

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    given the gorgeous pristine condition of your dial I would have a pro handle this job and simply get that sense of accomplishment with monkeying around on another watch. :D
     
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  4. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    Hi Al,

    Thanks for the info! Appreciate it.

    Just double checked the part number and I can confirm it is the 063PZ5072 that I had used. I hope the spare I have is the same one. 5DDF7A0A-C9F0-4ED2-8A1A-D75EA06D1D99.jpeg

    I just couldn’t get it to press in ::confused2:::thumbsdown: The crystal goes in from the front, am I correct?

    Thanks again,
    Chris
     
  5. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    Thanks @janice&fred It is in a very nice condition :D I would really want to give it a try myself. I had the entire dial and movement out of the case as a precautionary measure when I tried to fit the new crystal - I did foresee myself screwing up badly before I actually attempted.

    Could this have been the reason why it wouldn’t work? Though I wouldn’t think it is the problem as the crystal wouldn’t fit into the bezel, never mind being pressed all the way to the back of the case and being crushed.

    If I really can’t fit it on my second attempt, I will most likely take it to a reliable watchmaker who will try to extort all the money I have :(

    Best,
    Chris
     
  6. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    I forgot to mention, I was applying quite a tremendous amount of pressure trying to press the crystal in. So much pressure that I was perplexed at how reluctant the crystal was to fit in.

    To me it felt like I was using a lot more force than is required to fit such a crystal.
     
  7. X350 XJR

    X350 XJR Vintage Omega Aficionado Feb 12, 2020

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    Did you fit the bezel around the crystal first?
     
  8. Dan S

    Dan S Feb 12, 2020

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    What tool are you using to install the crystal?

    Edit: Sorry, I just noticed that you have a Bergeon crystal lift.
     
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  9. ChrisN

    ChrisN Feb 12, 2020

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    Surely you want advice from a watchmaker but, this is the opinion you have of us? Have you considered that we have to spend time learning this stuff and invest in tools as well?

    As a tip, have you looked at the cross section of your crystal in the area where it fits to the bezel? How do you think it should be installed?

    Chris
     
  10. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    Hi!

    I’m not quite sure what this means :thumbsdown: I was under the impression that the crystal (with tension ring) had to be pressed in from the front to fit on the bezel.

    Are you suggesting the crystal to be installed from behind the bezel, and pressed outward? How would I go about using the crystal press with only the bezel? I hope I’m not talking gibberish, haha.

    Thanks @X350 XJR !

    Chris
     
  11. Archer

    Archer Omega Qualified Watchmaker Feb 12, 2020

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    You know...I give people on forums all kinds of free technical advice daily, and usually people are thankful to get some advice from a professional, but there are times I do wonder why I bother...this is one of those times.

    Good luck with your watch.
     
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  12. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    Hi Chris,

    Thanks for your input. I don’t expect you to be watchmakers, I never mentioned this.

    I have considered it, yes. It is not as if I haven’t been doing it myself either. I have also invested on my time, tools, many watchmaker books, and browsing the web before posting here.

    Let me tell you, I had carefully inspected the parts for hours, trying to figure it out. I thought I got it. Obviously I was wrong.

    Thanks for your input.

    Chris
     
    Edited Feb 12, 2020
  13. VintageOmegaLove

    VintageOmegaLove Feb 12, 2020

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    I really do appreciate your advice @Archer and I have seen your many contributions on this forum.

    My apologies if I have offended you. I did not say this as a generalising statement. I have been quoted £120 for a crystal replacement by the watchmaker. I hope you understand where I’m coming from.

    I hope you accept my apology.

    Best,
    Chris
     
  14. sonicosa

    sonicosa Feb 12, 2020

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    I received a replacement crystal for my 136.017 in the mail last week. I couldn't get it in the watch with my crystal lift, so I came on OF and searched "crystal press".

    I am now headed to my neighborhood watch shop and will perhaps circle back to this topic a later date, haha.

    Toodaloo,

    Jens
     
  15. VintageOmegaLove

    VintageOmegaLove Feb 13, 2020

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    Hi Jens,

    I hope you got your watch sorted out! What was wrong with your originally-installed crystal?

    Best,
    Chris
     
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  16. sonicosa

    sonicosa Feb 14, 2020

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    It was just scratched up generic crystal, which I put a particularly deep gouge in on a recent work trip. I was able to find an Omega replacement on ebay. Hopefully I’ll be able to pick it up today and I’ll post a pic!
     
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  17. nkhandekar

    nkhandekar Feb 17, 2020

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    I have had a couple of Seamaster devilles and I have been able to squeeze the crystal back into place with my fingers. I also wiped any accumulated grime etc off with a microfibre swabs under the microscope. It brightens up the dial an awful lot.
     
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