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sinn u1 accuracy time

  1. How I regulate my U1's time without unscrewing the crown

    Hi All, So I have had my Sinn U1 for a month or two and I am bit of a stickler for accuracy. I keep an eye on the accuracy regularly and I find that the watch normally does +2 seconds a day. Now I have read a number of posts about the wearing the threads out if you unscrew the crown too...