In our impression, the most common and strictest standard for the precise timing of wrist watches is the accreditation of the Swiss official Observatory watches inspection institution that is called COSC. Today, this standard is still regarded as the key standard for the accuracy of watches. Swiss copy watches with COSC certification are usually reassuring, but COSC certification is not the only accurate certification indicator in the industry.
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In fact, there are also some certifications which are stricter than COSC certification. Rolex Super Observatory certification is one of them. And all Rolex watches with self-winding movements have been through this certification, so that the accuracy of them should be the most and does not need to worry.
While it has been enough that most of superb fake Rolex watches are only through the COSC certification. In the watch industry, the accuracy that it requires has arrived at the basic needs of most of people. What we can say is that Rolex is more accurate than others.