What is the first COSC certified quartz watch?
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  1. #1
    Member KingQuartz's Avatar
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    What is the first COSC certified quartz watch?

    What is the first watch/movement to be certified? And when did COSC start certifying quartz movements?
    I enjoy collecting non-European, in-house movement, manual-wind watches.

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    Member Tom-HK's Avatar
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    Re: What is the first COSC certified quartz watch?

    This is something I have actually wondered about, myself. I don't know the answer but there are a couple of things I think I can say :

    1. The COSC came up with their own definition for what constitutes a quartz chronometer as the international bodies that decide on standards have still not yet managed to sign-off on a definition.

    2. Pre-2001 COSC's spec for a quartz chronometer was incredibly lax. No thermocompensation was required but instead a movement just had to be able to keep time to what worked out to be about 60 seconds per year. As a result, it was not beyond the realms of possibility for a watch manufacturer to take a batch of ordinary, inexpensive and unremarkable quartz watches, test them to see which ones could beat 60 SPY, and submit those to the COSC for assessment and certification. This, indeed, appears to be how my Swatch Jelly Fish got its COSC chronometer certificate.

    Post-2001 things changed. Movements now must be thermocompensated and the SPY requirement is (whilst still complicated by allowances for temperature extremes) in the region of 25 SPY.
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    Re: What is the first COSC certified quartz watch?

    To add one other wrinkle to Tom's comments, remember COSC only deals with Swiss movements. The Seiko and Citizen HAQs have never been there.
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    Re: What is the first COSC certified quartz watch?

    Pretty certain most regular production from seiko, citizen, and the swiss would have trouble meeting 60 spy. I'm not aware of a bunch 5 spm movements.

    That aside, I would bet that Rolex Oysterquartz was probably one of the first if not the first. Just guessing but I think COSC might have started to test quartz at the requst of Rolex. Rolex does like to have chronometer on their dials.

    As far as I know the Oysterquartz was getting a COSC cert as early as 1979, and strangely the COSC specs at the time seem pretty tailored to it.

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    Re: What is the first COSC certified quartz watch?

    Indeed I can't think of another quartz watch than the OQ to have the COSC label on the dial.
    The Omega 1300/1301 (beta 21) were rated at 5 spm if memory serves and did have some form of TC according to some documents from the time so could likely have passed the test but they were long gone by that time of course.
    The Omega 1511/1516 were certified as Marine Chronometers between 1975 and 1977 by the Besançon Observatory but while the testing was pretty stringent the actual specs were lax at 3 spd ! It was more of a marketing ploy to try and recoup some money from the very costly 151x project...
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    Moderator Public Forum John MS's Avatar
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    Re: What is the first COSC certified quartz watch?

    I believe the Krieger Tidal watches used a chronometer
    graded quartz movement.

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    Re: What is the first COSC certified quartz watch?

    KingQuartz:
    Have no idea who produced the 1st COSC adhereing watch
    But here's some somewhat useless info I've gleaned from the WUS Forum
    Only 3% of Swiss watches will pass COSC. Or nuther words 97% WONT pass.
    The watch I own (of my 38 pieces, with decent WR) is my Reactor Prism. Has
    double gasket seals on the winding stem.
    So was a SCUBA diver (now an IronMan Triathlete) he wore only a dive com-
    puter. Not a watch, Wears a Garmin X720 doing Tri's.

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    Re: What is the first COSC certified quartz watch?

    How does the Oysterquartz stack up to the Grand Seiko 9F movements? Are they close? No contest? I'm very curious as I have a 9F in the mail as we speak, and have also admired the unusual funkiness of the Rolex quartz case/bracelet design.

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    Member KingQuartz's Avatar
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    Quote Originally Posted by wbird View Post
    I would bet that Rolex Oysterquartz was probably one of the first if not the first. Just guessing but I think COSC might have started to test quartz at the requst of Rolex. Rolex does like to have chronometer on their dials.
    Yeah, that sounds right. The first Rolex quartz watch: Date 5100 using the Beta 21 movement, didn't have "officially certified" on the dial. But the Oysterquartz which came right after does.

    Also, not all Oysterquartz watches have "officially certified" on the dial. Some ref 17000 watches (first Oysterquartz watch) do have "officially certified" and some don't.

    Attached: Rolex Date 5100
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    Attached: Rolex OQ 17000 (not certified)
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    Attached: Rolex OQ 17000 certified)
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    I notice that the majority of 1977 Oysterquartz watches are not certified, but few are. 1978 onwards they are, to my knowledge, all certified.

    I surmise that Rolex started getting their Oysterquartz watches certified sometime in late 1977.

    And if Oysterquartz was the first quartz watch to be certified, then COSC began certifying quartz watches late 1977.
    I enjoy collecting non-European, in-house movement, manual-wind watches.

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