Tech question about ETA 2830

Thread: Tech question about ETA 2830

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  1. #1
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    Tech question about ETA 2830

    Hi guys, I bought a Boucherer with an ETA 2830 movement in it the other day. It's engraved ETA 2830 (movement and case back interior), as well as 'RR.' Not sure if 'RR' is significant or not; anyone know? Mine is automatic, Day/Date. But does anyone know which of the two beat rates (see below) this movement is in, the 28800 or the 36000 vph?

    Ranfft doesn't list this exact calibre, but does list what I presume is the overall family group as:

    28800 A/h
    2801: manual wind
    2804: manual wind, date
    2816: manual wind, day, date
    2824: automatic, date
    2826-2: automatic, big date
    2828: automatic, day, date
    2930: automatic, day, date, Triovis regulator
    2834: automatic, day at 12h, date, 13'''
    2836: automatic, day 2 languages, date

    &

    36000 A/h
    2819: manual wind
    2806: manual wind, date
    2817: manual wind, day, date
    2826: automatic, date
    2832: automatic, day, date
    2837: automatic, day 2 languages, date
    2838: automatic, day at 12h, date, 13'''lists

  2. #2
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    Re: Tech question about ETA 2830

    It does not work?
    If it does You can test it with smartphone and an app Wildspectra https://forums.watchuseek.com/f2/rele...es-822114.html
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    Re: Tech question about ETA 2830

    It hasn't been serviced yet, but it's ticking at around 21 000 vph on Tickoprint. I presume that means that it is in the 28800 vph family, but just wondered about the 'RR' in particular.

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    Re: Tech question about ETA 2830

    Could it be Rail Road Certified?
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  6. #5
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    Re: Tech question about ETA 2830

    Quote Originally Posted by tinknocker View Post
    Could it be Rail Road Certified?
    I doubt it. They only really had that for pocket watches - and only really before WWII or a little afterwards.

    As for the beat rate, if it goes at 21600 A/h, it is hardly likely to be a 28800 A/h movement. If it isn't an entirely original Cal. 2830, it will have been downtuned by changing the geratrain. (Yes, this is possible - ETA have themselves done it quite recently to their Cal. 2824-2 to get a longer power reserve out of it.)

    Hartmut Richter

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    Re: Tech question about ETA 2830

    Thanks, Hartmut, I didn't realise that you could change the beat rate in this way. But of course it makes sense, now that you mention it.

    But I have no reason to believe that the movement is anything other than entirely original; my instinct is that it left the good folks at Bucherer as it is today; the movement is very clean, there are no watchmaker's marks on the case back and every screw head is unmarked, so I doubt that anyone has modified it, it simply doesn't 'feel' like it has been. Perhaps the 2830 was spec'd by them for a longer power reserve offering? In any event, I've downloaded Wildspectra, and will compare the beat rate there to that showing on Tickoprint and check that it is, in fact, running at 28 800, as I suspect. Anyway, it needs to be serviced next... by the way, it's listed on WatchWiki as 28 800 vph.

    In the meantime, here's a bit of information I found in this morning in an article at TimeZone.

    'The watch maker had also informed me that the movement in the watch was an ETA 2830, 21 jewel automatic day date. Bucherer later confirmed the watch was indeed 25 years old. Well, I took it back to see if it could be timed a little better. It took the watch maker about forty five minutes to do this while I waited. When he finished he brought it out to me and said the movement was adjusted to five positions and temperature and was tested digitally at under two seconds fast per day.'
    Last edited by Habitant; October 7th, 2014 at 10:47.

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