Help reattaching crown
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  1. #1
    Member Brance's Avatar
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    Help reattaching crown

    I just picked this watch up at a thrift store. The crown was in a plastic bag with it. The watch is running, but obviously I'd like to be able to set the time. :)

    I tried just putting it in the hole and turning clockwise, but it wouldn't grab ahold of anything. Do I have to remove the movement from the case to get at the stem before I can reattach the crown?

    If so, how do I get the movement out? It is solidly in place. Screwed down maybe?

    The movement appears to be a Felsa Bidynator 690.




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  2. #2
    Member Shikyo's Avatar
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    Re: Help reattaching crown

    You'll need a new stem. The stem shown in the picture is broken.

  3. #3
    Member Brance's Avatar
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    Re: Help reattaching crown

    I wondered if that was the case. Is that something I could do myself, or do I need to take it to a professional?

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  5. #4
    Member Dan S's Avatar
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    Re: Help reattaching crown

    It's always difficult to decide how much to invest in a watch where the case is in rough shape (e.g. with loss of plating), but if you are going to wear it, it would probably be wise to have a professional do a complete clean/oil/adjust service, and which time the stem can be replaced. It probably won't run very well or for very long otherwise. For a modest additional cost, you could also have him re-lume the hands, which seem to be in bad shape.
    pithy likes this.
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  6. #5
    Member Shikyo's Avatar
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    Re: Help reattaching crown

    Quote Originally Posted by Brance View Post
    I wondered if that was the case. Is that something I could do myself, or do I need to take it to a professional?
    You need to the correct stem and you need to remove the remains of the broken stem. They might come out easily, but from the picture you provided I'd imagine one would have to remove parts of the movement to gain access to the stem. On top of that, the movement is probably in need of a service.
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  7. #6
    Member YuriyV's Avatar
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    Re: Help reattaching crown

    If fair amount of thread remains on the stem near working plains, you could fit proper stem extender. For that you need correct thread diameter as well as some of common sense and tools to fit it.
    Although it is a good idea to pass it to professional.
    Vintage Zodiac addict.

  8. #7
    Member pithy's Avatar
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    Re: Help reattaching crown

    Quote Originally Posted by YuriyV View Post
    If fair amount of thread remains on the stem near working plains, you could fit proper stem extender. For that you need correct thread diameter as well as some of common sense and tools to fit it. Although it is a good idea to pass it to professional.
    I'd cut a new stem before I'd use an extender.
    Courtesy of ULF.

  9. #8
    Member YuriyV's Avatar
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    Re: Help reattaching crown

    Quote Originally Posted by pithy View Post
    I'd cut a new stem before I'd use an extender.
    Do you think topic starter has watchmakers lathe?
    Vintage Zodiac addict.

  10. #9
    Member pithy's Avatar
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    Re: Help reattaching crown

    Quote Originally Posted by YuriyV View Post
    Do you think topic starter has watchmakers lathe?
    Not specified.

    Do you think that the OP knows that the use of extenders is a hack repair or that the likelihood of clearing the tube and plate and there being sufficient thread on the rest of the stem is unlikely and that a new stem won't cost much more than the extender?
    Last edited by pithy; August 29th, 2017 at 20:03.
    Courtesy of ULF.

  11. #10
    Member Brance's Avatar
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    Re: Help reattaching crown

    Yeah, no. I did find a replacement stem on eBay for $8. But I think someone with tools and know how needs to do the operation. I'll be visiting the local watchmaker this week.


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