U1 accuracy query.

Thread: U1 accuracy query.

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  1. #1
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    U1 accuracy query.

    Hi. What accuracy are you getting from your U1's?
    Mine is now two months old and has been worn all day every day.
    I am getting exactly 12 seconds gain per day.
    Is that normal or reasonable?

  2. #2
    Member cadeallaw's Avatar
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    Re: U1 accuracy query.

    around +4 seconds... sometimes a little more, sometimes a little less... usually a little less

  3. #3
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    Re: U1 accuracy query.

    Mine's a 2007, last serviced in 2012. Worn for 16 hours and sitting on counter crown up at night it's about +3 sec./24 hrs.

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  5. #4
    Member apnk's Avatar
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    Re: U1 accuracy query.

    I've never had a Sinn that has gained anything over 5 seconds a day.
    Rolex Explorer, Tudor Pelagos, Sinn EZM3

  6. #5
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    U1 accuracy query.

    Had mine a week, worn every day and gains 4-5 seconds per day. Still wearing it in :).


    Sent from my iPhone using Tapatalk

  7. #6
    EHV
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    Re: U1 accuracy query.

    Mine is at +6 which is was from new. It's about 2 years old now.

    +12 per 24hr. is within spec for the movement. It's not chronometer grade and even though a lot of people claim better accuracy, +12 is not bad at all.

    If it's consistent at +12, I would not mess with it but if it really bothers you, you can have it regulated in an attempt to do better.

    Are you checking it against the same, always accurate source?

  8. #7
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    I am checking it against an atomic clock app called clocksync and also the UK's online GMT website. The 12 seconds deviation is very precise.

    I am mainly asking as if it is an excessive deviation then I will send it back to be regulated by sinn under warranty. I have no intention of getting it opened up by anyone else.

  9. #8
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    Re: U1 accuracy query.

    After over a year of ownership and wear in my rotation I am now getting about +3 sec/day. It did take about 3-4 months for the movement to break in.
    Tudor 25600TB :: Grand Seiko 61gs 1969 :: Nomos Club LE :: Rolex Exp 1 (T'Rex) :: Bonafide Seikoholic

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  10. #9
    Moderator German Watches Forum
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    Re: U1 accuracy query.

    12 sec/day fast seems a bit high for a U1. I suggest first demagnetize
    the watch to see if that has an effect. You don't need to open the
    case to demagnetize.


    Thanks,
    rationaltime

  11. #10
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    Re: U1 accuracy query.

    How do you place your watch when you take it off at night? I try to have mine so the case is horizontal, I found that lying it at an angle had an effect on accuracy.

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