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<blockquote data-quote="TANSTAAFL" data-source="post: 4180197" data-attributes="member: 27098"><p>I would be open to taking that challenge. I have a Rolex that I recently brought in for service, set it to the atomic clock and after 3 days it was still keeping exact time with the atomic clock. Not trying to brag on it, just saying mechanical timepieces do have the potential for great precision. One thing to remember is most quartz watches are not certified chronometers. There are two major third party certifications, COSC and METAS. </p><p></p><p>COSC: <a href="https://www.cosc.swiss/en" target="_blank">Cosc - Contrôle Officiel Suisse des Chronomètres | COSC</a></p><p></p><p>METAS: <a href="https://www.metas.ch/metas/en/home.html" target="_blank">Homepage</a> and <a href="https://www.everestbands.com/blogs/bezel-barrel/what-is-metas-master-chronometer-certification" target="_blank">What Is METAS Master Chronometer Certification?</a></p><p></p><p>Both show that watches will be accurate under a variety of Circumstances and Environments. Is it a big deal? You will pay a premium to get a watch that has met either certification. Does this mean a Citizen or Seiko is garbage or inaccurate? No. They just haven't applied. Personally I am a Fan of METAS Certification, since a watch must show accuracy is not affected after being exposed to a 15,000 Gauss Magnetic field. Only two manufacturers I am aware of meet this with their watches, Omega (most models) and Tudor (Some Black Bay's.) Examples of COSC are some Ball, some Tissot most Tudor, Some Longines, some Breitling, all modern Rolex.</p><p></p><p>Not certified? your really depending on company supplied numbers. </p><p></p><p>So, one can really dig into watches and discuss specifications, one can be a snob about it. I think [USER=24867]@thor447[/USER] offered good advice. Looking for something that keeps good time? Get a quartz battery, solar quartz, or mecha quartz or spring drive. Want some extra guarantees and do not mind paying a lot, go Certified. In general most quartz are not certified, but due to the Mechanism are far more accurate than certified. Citizen actually had one movement that boasted 1 second per year precision <a href="https://www.ablogtowatch.com/citizen-caliber-0100-worlds-most-accurate-watch-review/" target="_blank">Citizen Caliber 0100 World's Most Accurate Watch Review | aBlogtoWatch</a>.</p></blockquote><p></p>
[QUOTE="TANSTAAFL, post: 4180197, member: 27098"] I would be open to taking that challenge. I have a Rolex that I recently brought in for service, set it to the atomic clock and after 3 days it was still keeping exact time with the atomic clock. Not trying to brag on it, just saying mechanical timepieces do have the potential for great precision. One thing to remember is most quartz watches are not certified chronometers. There are two major third party certifications, COSC and METAS. COSC: [URL="https://www.cosc.swiss/en"]Cosc - Contrôle Officiel Suisse des Chronomètres | COSC[/URL] METAS: [URL="https://www.metas.ch/metas/en/home.html"]Homepage[/URL] and [URL="https://www.everestbands.com/blogs/bezel-barrel/what-is-metas-master-chronometer-certification"]What Is METAS Master Chronometer Certification?[/URL] Both show that watches will be accurate under a variety of Circumstances and Environments. Is it a big deal? You will pay a premium to get a watch that has met either certification. Does this mean a Citizen or Seiko is garbage or inaccurate? No. They just haven't applied. Personally I am a Fan of METAS Certification, since a watch must show accuracy is not affected after being exposed to a 15,000 Gauss Magnetic field. Only two manufacturers I am aware of meet this with their watches, Omega (most models) and Tudor (Some Black Bay's.) Examples of COSC are some Ball, some Tissot most Tudor, Some Longines, some Breitling, all modern Rolex. Not certified? your really depending on company supplied numbers. So, one can really dig into watches and discuss specifications, one can be a snob about it. I think [USER=24867]@thor447[/USER] offered good advice. Looking for something that keeps good time? Get a quartz battery, solar quartz, or mecha quartz or spring drive. Want some extra guarantees and do not mind paying a lot, go Certified. In general most quartz are not certified, but due to the Mechanism are far more accurate than certified. Citizen actually had one movement that boasted 1 second per year precision [URL="https://www.ablogtowatch.com/citizen-caliber-0100-worlds-most-accurate-watch-review/"]Citizen Caliber 0100 World's Most Accurate Watch Review | aBlogtoWatch[/URL]. [/QUOTE]
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