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Accuracy expectations: is -8 s/d acceptable on an entry-level automatic? · RWF-28559

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#1

My entry-level automatic loses about 8 seconds a day. The spec sheet lists a tolerance range, but I'm not sure how to read it or whether my measurement is reliable. Is this something to fix or something to live with?

Reply scope: address the opening question, explain the supporting record or reasoning, and state the limit of the answer.

#2

Start with how you measured it. Comparing against a phone clock once a day for a week, at the same time, and noting the offset is reliable enough. One 24-hour reading isn't, because rate depends on wrist time, position overnight and state of wind. Average across several days before deciding anything.

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