The accuracy of my Grand Seiko 25th Anniversary SBGV238
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Thread: The accuracy of my Grand Seiko 25th Anniversary SBGV238

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  1. #1
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    The accuracy of my Grand Seiko 25th Anniversary SBGV238

    After more than 35 days, my Grand Seiko 25th Anniversary SBGV238 has absolutely undetectable error of any kind compared to the WWV Atomic Clock time signal...It is coming up on 36 and a half days, which it woulkd be off by half a second if it was accurate to the specified 5 seconds per year, but after more than 35 days it is absolutely spot on...Amazing accuracy!
    RyCheDay and beanerds like this.

  2. #2
    Member Tom-HK's Avatar
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    Re: The accuracy of my Grand Seiko 25th Anniversary SBGV238

    Quote Originally Posted by Watchlover333 View Post
    After more than 35 days, my Grand Seiko 25th Anniversary SBGV238 has absolutely undetectable error of any kind compared to the WWV Atomic Clock time signal...It is coming up on 36 and a half days, which it woulkd be off by half a second if it was accurate to the specified 5 seconds per year, but after more than 35 days it is absolutely spot on...Amazing accuracy!
    This is good news, indeed. Don't be surprised if the rate changes, slightly, in the height of summer. If it's spot on for current climatic conditions, then expect a bit of drift when things temperatures change significantly.
    ronalddheld likes this.
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