automatico Posted September 5, 2013 Report Share Posted September 5, 2013 With Eta 2846 getting harder to find besides many being 17 jewel models, this looks like a good deal on nos Eta 2879 25 jewel qs 21600 bph d/d movements. Same basic specs as 2846.eBay item number 130752197593 Quote Link to comment Share on other sites More sharing options...
woof* Posted September 5, 2013 Report Share Posted September 5, 2013 fits same cases the 2846 fits? Quote Link to comment Share on other sites More sharing options...
irolexu Posted September 6, 2013 Report Share Posted September 6, 2013 According to mymanmatt they do Quote Link to comment Share on other sites More sharing options...
Nanuq Posted September 6, 2013 Report Share Posted September 6, 2013 Same dimensions, slightly different stem height I think. Quote Link to comment Share on other sites More sharing options...
automatico Posted September 6, 2013 Author Report Share Posted September 6, 2013 "fits same cases the 2846 fits?"It looks like the main difference is the rotor bearing.I'll try one in a case made for a 2836 and see if it works as the 2836 and 2846 are about the same. If any thickness difference is below the stem centerline it should work Ok.The difference in thickness shown below in the specs may be the calendar spacer because it is noted as .15mm thick on the 2879.From The Ranfft website:287911.5'', Dm= 25.6mm, Do= 26.0mmH= 5.35mm(dial spacer +0.15mm)F= 0.6mmT= 2.3mm17/21/25 jewelsf = 21600 A/hpower reserve 55h284611.5'', Dm= 25.6mm, Do= 26.0mmH= 5.2mmF= 1.65mmT= 2.25mm17/21 jewelsf = 21600 A/hpower reserve 48hUpdate:I tried an Eta 2879 in a case made for an Eta 2836 and it fits fine, everything lines up, stem is in the center of the case tube etc.They are not hack movements but the hack lever can be installed. They will also need c/o but I figure it's better to spend $$ having a nos movement serviced than an old movement with unknown history. Quote Link to comment Share on other sites More sharing options...
mymanmatt Posted September 6, 2013 Report Share Posted September 6, 2013 It does work Quote Link to comment Share on other sites More sharing options...
modelizer Posted September 6, 2013 Report Share Posted September 6, 2013 Nice find there automatico! Thanks for sharing! Quote Link to comment Share on other sites More sharing options...
sneed12 Posted September 6, 2013 Report Share Posted September 6, 2013 It does fit, just checked yesterday. have one recently serviced by Domi I'm not using if anyone is interested. Quote Link to comment Share on other sites More sharing options...
aeromatic Posted September 29, 2013 Report Share Posted September 29, 2013 I just purchased a bunch of 2472s and 2451s for future projects i saw that on ebay i have been having a problem fitting the 2846 and 2836-2 in to a big crown yuki style case the stem alignment is out and now only option is to use a more modern 2892-2 which is slimmer but fast beat Quote Link to comment Share on other sites More sharing options...
automatico Posted September 29, 2013 Author Report Share Posted September 29, 2013 A 2824 might be thin enough.Try a 2824 and if it will work, maybe use a 2824 with the escapement/escape wheel/pallet fork from a 2846 so it runs at 21600 bph. Quote Link to comment Share on other sites More sharing options...
Catfish1 Posted September 29, 2013 Report Share Posted September 29, 2013 Great information, thanks for sharing. Quote Link to comment Share on other sites More sharing options...
Ephry73 Posted September 29, 2013 Report Share Posted September 29, 2013 I ha a few of these and they do work great. Quote Link to comment Share on other sites More sharing options...
aeromatic Posted September 30, 2013 Report Share Posted September 30, 2013 A 2824 might be thin enough. Try a 2824 and if it will work, maybe use a 2824 with the escapement/escape wheel/pallet fork from a 2846 so it runs at 21600 bph. Thanks automatico ! i have not tried a 2824 only 2836 also the 2472 was closer but still will not align Quote Link to comment Share on other sites More sharing options...
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