COSC vs. Non Cosc Stowa movements?

Thread: COSC vs. Non Cosc Stowa movements?

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  1. #1
    Member doc3341's Avatar
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    COSC vs. Non Cosc Stowa movements?

    Hey guys...

    Ive got another Newbie question here: How do the COSC movements compare to the non-COSC movements???
    Cheers,

    Mike

    Previously Enjoyed

    DOXA 750T Sharkhunter
    DOXA 750T Professional GMT
    Seiko Prospex Ti "Samurai" SBDA003
    MKII Stingray

  2. #2
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    Re: COSC vs. Non Cosc Stowa movements?

    hi, you might scroll down half way down the page and check out the thread " to cosc or not to cosc".

    i think many have found that the non-cosc watches keep cosc time...though some like the decorated movements with the cosc and that added assurance, so to speak, for the certification.

    cheers
    --AC

  3. #3
    stuffler,mike
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    Re: COSC vs. Non Cosc Stowa movements?

    Some info:

    The material differences are listed below:

    Standard and Elabore:
    Mainspring - Nivaflex NO
    Shock protection - Etachocs
    Pallet stones - Polyrubies, Epilame-coated
    Balance - Nickel gilt
    Balance staff - Epilame coated
    Collet - Nivatronic
    Hairspring - Nivarox 2
    Hairspring heat treatment - Etastable

    Top and Chronometre:
    Mainspring - NivaflexNM
    Shock protection - Incabloc
    Pallet stones - Red rubies, Epilame-coated
    Balance - Glucydur gilt
    Balance staff - Epilame coated
    Collet - Nivatronic
    Hairspring - Anachron
    Hairspring heat treatment - Etastable

    The performance differences are the big differences between the various grades: ("The limit values are subject to interpretation: 95% of the pieces delivered in a lot must be within the specified limits.")

    Standard:
    2 positions (CH, 6H)
    daily rate: +/-12 sec/day
    Maximum positional variation: 30 sec
    Isochronism (between 0 and 24 hours): +/- 20 sec

    Elabore:
    3 positions (CH, 6H, 9H)
    daily rate: +/-7 sec/day
    Maximum positional variation: 20 sec
    Isochronism (between 0 and 24 hours): +/- 15 sec

    Top:
    5 positions (CH, FH, 6H, 9H, 3H)
    daily rate: +/-4 sec/day
    Maximum positional variation: 15 sec
    Isochronism (between 0 and 24 hours): +/- 10 sec

    Chronometre:
    As per COSC specifications, which as far as most owners will notice, isn't much different from Top grade.

    Using the search function would have delivered some interesting threads/posts here on WUS.

    Stowa watches most of the time are regulated to those specs. Some perform even better.

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  5. #4
    Member doc3341's Avatar
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    Re: COSC vs. Non Cosc Stowa movements?

    You guys are geat!! Thanks for all the awesome info!



    Mike
    Cheers,

    Mike

    Previously Enjoyed

    DOXA 750T Sharkhunter
    DOXA 750T Professional GMT
    Seiko Prospex Ti "Samurai" SBDA003
    MKII Stingray

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