Hi suliva,
If you check the manual of the watch you will see that error of these watches is +-15sec/month (depends on the movement and temperature of operation that you have) which brings your error inside the range. Don't worry. If you keep your watch around 28oC it will have min. error.
Cheers,
RzA
It's part of the design. this let's you know it's time to change the battery.
Don
www.finewatchmaking.com
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