ETA 2892-A2 Chronometer grade
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  1. #1
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    ETA 2892-A2 Chronometer grade

    I tried in the watchmaking forum, but no luck, so perhaps here someone will know.

    How can one recognize a chronometer grade ETA 2892? Is the serial number on the movement a sure sign? Or are there also some non-chronometer grade movements with serial numbers?

  2. #2
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    Re: ETA 2892-A2 Chronometer grade

    Chronometer grade does not necessarily mean that it has been chronometer tested. Only a movement that has been tested and passed COSC standards will have a COSC number on it.

  3. #3
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    Re: ETA 2892-A2 Chronometer grade

    Well, that is not true. Chronometer grade movement must have a factory serial number, because without a serial number COSC will not test it. Serial number however does not mean a movement was actually tested, or that it passed the test.

    What I don't know is if there are also some top and elabore grade movements with serial numbers.
    From Wikipedia:
    Chronometer grade movements are serial numbered, as that is a requirement of the certification authority.
    Last edited by Okapi001; March 25th, 2016 at 17:48.

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  5. #4
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    ETA 2892-A2 Chronometer grade

    My understanding is that if ETA sells it as chronometer-grade, it has been so certified by COSC, and that requires a serial number. I do not know if ETA serialized their top-grade movements, and that may be a matter of the watch company. I have lots of top-grade 2892 movements, but without display backs, so I can't check.

    Except for possibly the serial number (which I know is what you were asking about), there are no other visual differences. Absent special watch-company requirements, top and chronometer grades are equipped with the same parts and receive basically the same adjustments.

    Rick "what's the situation?" Denney
    Zenith: Captain Chronograph 03.2110.400*; Cartier: Santos 100 XL Concord: Mariner, C1 Big-Date, C1 v.2 Chronograph; Ebel: Chronosport 1134901, Tekton 9137L83*, Type E 9137C41* (*=COSC)
    Ebel: 1911 BTR 9137L73* and 9139L71*, 1911 1120L41*, 1911 Senior 9080241, Brasilias 9120M41 (2), Aquatica 500 9120K61, Classic Hexagon GMT 9301F61, Classic 100 LE 9120R41; Baume & Mercier: Capeland World-Timer
    Heuer: Carrera 1964 Re-Edition CS3110; Maurice Lacroix: Masterpiece MP6439; "Seagull": 1963 Reissue cal. ST19; Seiko: Black Monster SRP307; Poljot: Sturmanskie cal. 3133; Tissot: T-Touch Lew and Huey: Acciona
    Vintage: JLC: ref. 2953, ca. 1946; Longines: Flagship cal 285; Zodiac: SST cal. 86, Aerospace GMT cal. 72; Favre-Leuba: cal. 253; Tianjin: Dong Feng cal. ST5; Elgin: Gr. 152 (1898), Gr. 384 (1919); Ebel: ca. 1962 ref. 9214955
    WUS: ST5 Project Watches (Black and Blue), F72.2014.DG3804 (Gray and Cream); Swatch: Sistem 51 Blue; TNT: Rattrapante cal. Rochat 7750+RAT-1

  6. #5
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    Re: ETA 2892-A2 Chronometer grade

    I don't think ETA sells them with COSC certificates. AFAIK watch manufacturers submit purchased movements for certification, not ETA. There are reports on how many watches are certified by individual brands, which I think means brands are submitting movements for certification, not ETA.

    Anyway, situation is that I got some 2892 movements with serial numbers (but without any papers) and would like to know, just out of curiosity, if they are indeed chronometer grade. They do perform flawlessly on the timegrapher.

  7. #6
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    Re: ETA 2892-A2 Chronometer grade

    ETA may submit them on behalf of companies and at their expense, but they are tested without rotors and as bare movements with plastic crowns.

    It was probably true at one time that being chronometer-grade just meant having the right parts, and adjustment, regulation and testing was done by the watch company. I suspect that ended when ETA stopped selling ebauches. I don't know. But if I bought a chronometer-grade movement and it failed COSC testing, I'd be sending it back to ETA.

    I only have one COSC certificate for a watch with a supplied movement, though it is from the late 90's, but now I'm curious as to how it describes the movement other than by number.

    Rick "noting that companies are not required to provide certificates for certified watches" Denney
    Zenith: Captain Chronograph 03.2110.400*; Cartier: Santos 100 XL Concord: Mariner, C1 Big-Date, C1 v.2 Chronograph; Ebel: Chronosport 1134901, Tekton 9137L83*, Type E 9137C41* (*=COSC)
    Ebel: 1911 BTR 9137L73* and 9139L71*, 1911 1120L41*, 1911 Senior 9080241, Brasilias 9120M41 (2), Aquatica 500 9120K61, Classic Hexagon GMT 9301F61, Classic 100 LE 9120R41; Baume & Mercier: Capeland World-Timer
    Heuer: Carrera 1964 Re-Edition CS3110; Maurice Lacroix: Masterpiece MP6439; "Seagull": 1963 Reissue cal. ST19; Seiko: Black Monster SRP307; Poljot: Sturmanskie cal. 3133; Tissot: T-Touch Lew and Huey: Acciona
    Vintage: JLC: ref. 2953, ca. 1946; Longines: Flagship cal 285; Zodiac: SST cal. 86, Aerospace GMT cal. 72; Favre-Leuba: cal. 253; Tianjin: Dong Feng cal. ST5; Elgin: Gr. 152 (1898), Gr. 384 (1919); Ebel: ca. 1962 ref. 9214955
    WUS: ST5 Project Watches (Black and Blue), F72.2014.DG3804 (Gray and Cream); Swatch: Sistem 51 Blue; TNT: Rattrapante cal. Rochat 7750+RAT-1

  8. #7
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    Re: ETA 2892-A2 Chronometer grade

    Quote Originally Posted by Okapi001 View Post
    Well, that is not true. Chronometer grade movement must have a factory serial number, because without a serial number COSC will not test it. Serial number however does not mean a movement was actually tested, or that it passed the test.

    What I don't know is if there are also some top and elabore grade movements with serial numbers.
    From Wikipedia:
    A chronometer grade movement and a COSC certified movement are not necessarily the same thing.

    One can theoretically buy a chronometer grade movement that has not been tested by COSC. It will not have a serial number on it and the watchmaker cannot claim that the watch is a Chronometer. They can however claim that it is a chronometer grade movement.

    A chronometer grade movement is a movement that has been built to the specifications the manufacturer has decided. When ETA sold movements to third parties it was possible to buy these without COSC certification and they do not have serial numbers. I currently own at lest one such watch and have owned at least one more. There are numerous watches that were available with chronometer grade movements.
    As a side note, all my actual chronometers have COSC certificates as well as serial numbers on the movements. I recently even had a 14 year old COSC movement changed out for another by the manufacturer and got a COSC certificate with that plus, documents showing the old movement number being swapped out for the new one by the manufacturer.
    Last edited by Henry Krinkle; March 27th, 2016 at 21:52.
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