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Thread: Seiko scratch recovery?

  1. #1
    Craftsman
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    Seiko scratch recovery?

    I have one or two scratches on the crystal of my 7T27-7A20. Is that something which can be recovered (e.g. Polywatch), or would it be a case of a new crystal? Wondering if this one is polishable or not?

    They're quite minor and down at one edge so could easily live with, but....I do like my watches looking pristine! :-)

  2. #2
    Most crystals can be polished - glass and sapphire can be polished with diamond paste.
    It's just a matter of time...

  3. #3
    Craftsman
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    Thanks. From what I read it seems like the crystal is 'Hardlex', would that be right? It sounds like polishing out might take quite a while to achieve!

  4. #4
    Master
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    Quote Originally Posted by Senninha View Post
    Thanks. From what I read it seems like the crystal is 'Hardlex', would that be right? It sounds like polishing out might take quite a while to achieve!
    It will be pretty difficult- maybe get a replacement crystal

  5. #5
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    Seiko scratch recovery?

    .. If it is hardlex, it can be done - but don't be in a hurry .. Set of diamond polishing paste tubes and go at it for an hour a go for a couple of weeks.. I'd a KS crystal that had /no/ availability on replacement crystal with some nasty gouges I got back to as per the below ..

    al

  6. #6
    Master Seiko7A38's Avatar
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    More like nigh on impossible and a complete waste of effort, for the cost of a replacement crystal.

    The original Seiko crystal p/n is obsolete and NLA, but there's the Sternkreuz substitute, p/n XMF320.927 - available from Cousins UK for 4.15 + VAT.

    https://www.cousinsuk.com/search?SearchTerm=xmf320.927
    Last edited by Seiko7A38; 14th January 2018 at 13:59. Reason: Checking part # cross reference

  7. #7
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    Quote Originally Posted by Seiko7A38 View Post
    More like nigh on impossible and a complete waste of effort, for the cost of a replacement crystal.

    The original Seiko crystal p/n is obsolete and NLA, but there's the Sternkreuz substitute, p/n XMF320.927 - available from Cousins UK for 4.15 + VAT.

    https://www.cousinsuk.com/search?SearchTerm=xmf320.927
    Thank you sir, exactly what I was after, much appreciated. Is that an easy fix(*) or is there anyone recommendable who is good with these Seiko models?

    (*) Absolutely klutz-proof! :-)

  8. #8
    I've used cerium oxide glass polishing compound to good effect on Seiko's with hardlex though does take some time.

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