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Thread: Question on ETA 2836 vs 2824: cost, accuracy, differences

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  1. #1
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    Question on ETA 2836 vs 2824: cost, accuracy, differences

    I had thought the ETA 2836 was just the day/date version of the 2824, but recently I looked at the Bernhardt Corsair, which uses the 2836 but only has the date. If one wanted to only include a date complication, couldn't you just use a 2824?

    Moreover, reviews of ETA 2836 movement watches I've seen (such as the Corsair and batch I of the Prometheus Ocean Divers) seem to indicate a pretty consistent accuracy of +/- 15 secs per day, which is generally somewhat worse than 2824 reviews I've seen. Admittedly, these reviews are pretty anecdotal, which is why I'm posting this.

    So my question: what are the differences between the ETA 2824 & 2836 movements? Do both of these movements come in varying grades? What is the rough price difference in cost of the movements? And finally, do both generally return the same level of accuracy?

    thanks for your answers,

    Severian

  2. #2
    Affordables Moderator zippofan's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    The 2836 is essentially just the day/date version of the 2824. The Corsair has the dial cutout for the date and not the day. Some of Bernhardt's watches use the 2836 and convert the day wheel into the 24 hr complication.

    This is an ETA2846, same as the '36 only it has a lower beat rate of 21600 instead of 28800:



    I used a dial that only had the date wheel cutout, the day is hiding under the dial.

    Because the '36 has the day wheel, the movement is slightly higher than the 2824, that is pretty much the difference between the two. Yes, they come in different grades, standard is the most often used in affordables but the movements can be had in top and elabore grades too.

    Lysander has posted comparisons of the differences in dimensions here on WUS, maybe in the Watchmaking forum.

    Cheers,
    Griff

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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    thanks much! So if I understand correctly, if a designer only wanted a date complication on his watch, he would only choose the more expensive 2836 over the 2824 because of the difference in dimension between the two movements?

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    Affordables Moderator zippofan's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    Here's the funny thing that I've noticed lately. Raw 2836 movements were going for $25 to $50 less than a 2824. I have no idea why, given the 2836 is more complicated with more parts. I bought my 2846 for almost $75 less than a 2824, $50 less than a 2836. Since I wanted a lower beat movement for my sub I was extra happy at the cost savings.
    One thing to note, 2824 and 2836 movements are not necessarily interchangeable because of the stem height. While the difference is measured in mm, it means a crooked stem fitting a 2824 in a case machined for a 2836 and vice versa. You can substitute a 2846 for a 2836 because the stem height is the same.

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    Moderator Lester Burnham's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    The 2846 is pretty much the 7s26 of ETA right? Except from the fact that the 7s26 can't be hand wound and it doesn't hack. I've seen new watches on eBay (especially 'Octo' branded watches) with 2846's in them go for much less than $50..

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    Affordables Moderator zippofan's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    Quote Originally Posted by Lester Burnham View Post
    The 2846 is pretty much the 7s26 of ETA right? Except from the fact that the 7s26 can't be hand wound and it doesn't hack. I've seen new watches on eBay (especially 'Octo' branded watches) with 2846's in them go for much less than $50..
    Some of the 284x series are used in Swatch autos so that could be. The one I used is signed Mondaine on the rotor I was happy to get it NOS for under $60 with shipping versus over $100 for a 2836.

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    Member lysanderxiii's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    Several reason why you use a 2836-2 over a 2824-2:

    1) Buy in bulk, save money. The more units you can purchase the cheaper to can get them per unit.

    2) Common casees (see #1). The 2824 and the 2836 have different stem heights, so if you use 2824s you will have to get separate cases for these.

    3) Common dials (see #1). the 2836, because of the taller stem height requires longer feet on the dial.

    4) All other components of the 2824 and 2836 are interchangable, so for them it doesn't matter which you use.

    Why the 2836-2 can be cheaper:

    1) The 2836 and the 2834, aren't quite as popular as the 2824-2, so they are sold and a lower price.

    2) Sometimes overruns of 2834-2, the least popular of the bunch are reworked into 2836-2, since all parts except the day dial and plastic spacer are the same.

    There are more differences between the 2836 and the 2846 than just the beat rate. The entire autowind system is different and many of the pieces are made different to exploit manufacturing streamlinings. The 2846 is a much cheaper movement.

    An example is the pallet fork of the 2824/2834/2836 is a nicely machined piece of steel, with the safety pin for the safety pin is a separate piece riveted in place, the 2846 pallet fork is stamped with the safety pin made from the the center part of the fork just bent down. As a consequence very few parts will interchange between the 2846 and the 2824 or the older 278x, high grade 21,600 bph movements.There was a date only version of the 2846. the 2842. It ceased to be made as the 2846 sold better, see above for the reasons why.
    Last edited by lysanderxiii; May 27th, 2010 at 18:34.
    Parit enim conversatio contemptum; raritas conciliat admirationem.- Lucius Apuleius
    est necessry, accurate ad secundo? - Lysander magna
    iustum est horologium - Obscurus Genius

  8. #8
    Affordables Moderator zippofan's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    Thank you for clarifying Lysander!

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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    IMHO 2836 is slightly better movement. One of the differencies is the date change - it's a lot faster on 2836.

  10. #10
    Member lysanderxiii's Avatar
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    Re: Question on ETA 2836 vs 2824: cost, accuracy, differences

    I don't know if I would consider the date jumping from 2 to 3 faster as "better."

    And, I never noticed a marked difference between a 2836 and 2824 date change...
    Parit enim conversatio contemptum; raritas conciliat admirationem.- Lucius Apuleius
    est necessry, accurate ad secundo? - Lysander magna
    iustum est horologium - Obscurus Genius

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