Practically all ETA movements are good. Generic, boring - but good. ETA had the edge over the other generic makers insofar as they also made in house movements for Eterna and therefore had experience in both departments. In my experience, their movements are the most durable Swiss generic calibres there are.
Structurally, I can find little difference between the ETA 2789 and the ETA 2836 so I tend to think of the former as being a precursor to the latter.
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