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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsOmega’s Laboratoire de Précision is an Omega-created testing laboratory launched in 2024 as an alternative route for Swiss chronometer testing. It is positioned alongside COSC, not as a replacement for it: the available official material does not establish that the lab’s chronometer criteria are stricter than COSC’s or provide a complete, like-for-like comparison of their protocols.
What is Omega’s Laboratoire de Précision?
Omega announced the Laboratoire de Précision on 3 April 2024. The company described it as authorized by the Swiss Accreditation Service (SAS) to carry out alternative and independent testing for chronometers. The lab’s own website describes it as an independent certification body available to any brand. Omega’s launch announcement and the laboratory’s official site present it as a new testing route, rather than a new name for COSC.
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Omega says it created the lab but intends it to operate neutrally and independently, accepting work from all brands and movement manufacturers. That is the stated operating model. The public material cited here does not include an external governance audit or a public list of non-Omega clients, so it does not establish how much outside-brand testing has taken place.
Is Omega replacing COSC?
No. Omega’s 2024 announcement describes the lab as an alternative to COSC-style chronometer testing, not as a replacement for COSC. The existence of another testing laboratory gives brands a potential additional route, but it does not show that COSC is being displaced.
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Nor does the available material prove that Omega’s chronometer criteria are stricter than COSC’s. Omega has published an accuracy figure for conventional chronometer certification, but the sources here do not provide enough direct protocol detail from both organizations to compare their tests fully. A claim that one is better, tougher, or equivalent would go beyond the established evidence.
How SAS, METAS, and COSC fit into the picture
These names refer to different roles. SAS authorization or accreditation concerns the laboratory’s competence and scope as a testing provider; METAS certification concerns defined Master Chronometer measurements. Neither designation should be treated as interchangeable with the other, or as simply another name for COSC.
| Organization or body | Documented role | What this does not establish |
|---|---|---|
| Laboratoire de Précision | Omega-created lab; Omega says SAS authorized it for chronometer testing. The lab says it is certified by METAS for Master Chronometer measurements under requirement N001. | These statements do not establish that the lab’s chronometer criteria outperform COSC’s or that its independence has been externally audited. |
| SAS | Swiss Accreditation Service; Omega identifies it as the authority authorizing the lab to carry out alternative independent testing. | SAS authorization is not itself a watch’s Master Chronometer certification. |
| METAS | Provides independent certification against defined standards; its watch-certification information describes this service. | METAS is not the Laboratoire de Précision, and METAS certification is not the same label as SAS accreditation. |
| COSC | Long-established Swiss chronometer certification route, described by Omega as the reference the new lab can offer an alternative to. | The material available here does not support a complete side-by-side comparison of COSC and the laboratory’s test protocols. |
For the bodies’ own descriptions, see METAS’s watch-certification page and the Laboratoire de Précision site.
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What accuracy figures and test criteria are established?
In an October 2025 article, Omega gave -4/+6 seconds per day as the precision criterion for conventional “chronometer” certification when contrasting it with Master Chronometer. That is Omega’s characterization; the official COSC material reviewed here does not independently confirm that specific figure. It should not be presented as a verified comparison of the complete COSC and Laboratoire de Précision protocols.
Omega also reported in that 2025 article that more than 2.5 million of its watches had earned the “Co-Axial Master Chronometer” title. This is a company-reported cumulative figure, not an independently audited count. Neither figure by itself demonstrates how many watches the new laboratory has tested or how its overall testing compares with COSC.
What changed with the 2026 acoustic testing method?
On 26 March 2026, Omega said the laboratory had developed acoustic testing combined with optical hand-tracking. Omega said this method enabled the two-hand Constellation Observatory watches to achieve Master Chronometer certification without a seconds hand. The announcement is a specific example of the lab’s work; it does not establish that the same method is used for every watch or describe a complete testing protocol for all models.
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Omega President and CEO Raynald Aeschlimann said: “Until now, precision certification has required a seconds hand. The development of a new acoustic testing methodology has made that requirement obsolete. It is this breakthrough that has enabled us to present the Constellation Observatory, the first two-hand watch to achieve Master Chronometer certification.” This is Omega’s account of the development and its significance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the available evidence does—and does not—show
- Established: Omega created and launched the laboratory in 2024, and says SAS authorized it for alternative chronometer testing.
- Stated by Omega and the lab: It is intended to operate independently and accept work from other brands. The public material cited here does not verify outside client history or an external governance audit.
- Distinct certification roles: The lab says it is certified by METAS for Master Chronometer measurements under N001; this is not the same as SAS authorization for chronometer testing.
- Not established: A complete current comparison of COSC and Laboratoire de Précision protocols, the lab’s current list of non-Omega clients, or a public total of tests performed.
- Model-specific caution: A particular Omega watch’s certification should be checked against that model’s own specifications; the announcements do not mean every Omega watch is a Master Chronometer.
Omega’s original announcement called the laboratory “officially authorized by SAS (the Swiss Accreditation Service) to carry out alternative and independent testing.” That wording supports the existence of an alternative route; it does not settle the broader question of which certification is more demanding.
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