When is a cracked crystal too cracked?

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  1. #1
    Member spacetimefabric's Avatar
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    When is a cracked crystal too cracked?

    Hi, I have an Omega Geneve with a crystal that has a small barely visible crack at the edge. My local watchmaker once looked at it on the surface and said that I needn't worry about it.

    Now, I'm about to ship it to a different watchmaker for an overhaul and am thinking of noting that I know of the cracked crystal, but would rather keep the original. The question is: should I be worried about moisture and accept a non-original crystal, should the watchmaker raise the issue?

    I've included a photo below. It's only visible if you look at it from the side near 7 o'clock, and when I rub my finger along the edge, i don't feel the crack.

    And on a larger level, of curiosity: When is a crystal crack significant enough to warrant concern? How can you tell?

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    Last edited by spacetimefabric; November 1st, 2012 at 21:05.
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  2. #2
    Member AbslomRob's Avatar
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    Re: When is a cracked crystal too cracked?

    Back in the day, it wasn't uncommon for watchmakers to just automatically swap the crystal out on every service. Unless the crystal is "signed", there usually isn't any good reason for not switching it. A new crystal can dramatically improve the visual appeal of a watch, after all.

    So I guess my question is, why wouldn't you want to have the crystal replaced?
    My growing collection of "affordable" vintages: http://www.abslomrob.com

  3. #3
    Member spacetimefabric's Avatar
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    Re: When is a cracked crystal too cracked?

    The existing one is the original "signed" crystal for the watch, and so I'd like to keep it, if possible.
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  5. #4
    Member blue92's Avatar
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    Re: When is a cracked crystal too cracked?

    Quote Originally Posted by spacetimefabric View Post
    The existing one is the original "signed" crystal for the watch, and so I'd like to keep it, if possible.
    A cracked crystal (no mater how small) will allow moisture into the watch and end up damaging the dial. What's the case number I have a friend that ran an Omega service center for 25 years and he may have one, or know someone that has one.

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    Member lysanderxiii's Avatar
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    Re: When is a cracked crystal too cracked?

    If the crack goes all the way through the plastic, replace it....
    familiaritas parit contemptum; raritate admiratione wins.- Lucius Apuleius
    est necessry, accurate ad secundo? - Lysander magna
    iustum est horologium - Obscurus Genius

  7. #6
    Member dacattoo's Avatar
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    Re: When is a cracked crystal too cracked?

    I agree, replace it. One incident with moisture and your dial and hands are toast. Why risk it? You can still get Omega 'signed' crystals for your watch. A new crystal is practical and a thing of beauty! Kind of like when I wash my truck, doesn't really look good until I shine the windows. Little cracks never get littler!

  8. #7
    Member spacetimefabric's Avatar
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    Re: When is a cracked crystal too cracked?

    From the looks of it, the case is 135.041. I looked it up on Ofrei, but didn't see a crystal listed for this case. Perhaps one of the other ones listed would fit? Let me know if that is possible or if there are other sources for this particular crystal. It would probably be better for me to send along a replacement crystal with the watch to the watchmaker.
    Thanks.

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    Last edited by spacetimefabric; November 1st, 2012 at 23:38.
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  9. #8
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    Re: When is a cracked crystal too cracked?

    The question:
    When is a cracked crystal too cracked?


    The only right answer:
    ALWAYS!!!

    br
    emso

  10. #9
    Member spacetimefabric's Avatar
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    Re: When is a cracked crystal too cracked?

    I found this info for the crystal
    Glas 5004 Plexiglas (gelb) 9651PX5004

    At this boley.de site (in German):
    Omega - 135.041 - boley GmbH

    I've also measured the crystal from the outside with digital calipers and got about 31.6mm on the outside.

    When I looked up crystals on the bay, I found several of this sized outer diameter at decent prices, but many mentioned a tension ring of various finishes, from chrome to white to gold. I don't think mine has these, right?

    Ideally, I'd also have the inside diameter, but seems like the only way to get that is to press out the crystal and measure it.

    Unless anyone knows the exact dimensions of the Omega crystal above?

    Any help would be appreciated. Thanks.
    Last edited by spacetimefabric; November 2nd, 2012 at 05:17.
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  11. #10
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    Re: When is a cracked crystal too cracked?

    Quote Originally Posted by spacetimefabric View Post
    From the looks of it, the case is 135.041. I looked it up on Ofrei, but didn't see a crystal listed for this case. Perhaps one of the other ones listed would fit? Let me know if that is possible or if there are other sources for this particular crystal. It would probably be better for me to send along a replacement crystal with the watch to the watchmaker.
    Thanks.

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    Why would you need to supply the crystal? Most watchmakers can get crystals for watches, so I don't think you really need to supply it. And if the watch has been serviced before, likely the crystal has been changed in the past, so although it's possible this is the "original" crystal that came with the watch, it's not likely.

    In any case, brand new crystals are available from Omega for this case. The part number Omega lists for that reference in steel is 063PZ5004. The diameter is 31.62 and the height is listed as 4.2.

    Hope this helps.

    Cheers, Al

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