3rd Party Movements: ETA, Miyota, Seiko

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Re: 3rd Party Movements: ETA, Miyota, Seiko

Post by 3Flushes » August 19th 2021, 3:18pm

I have always just lumped ETA and Valjoux together.

With any movements, a lot depends on who's assembling, regulating, and casing them up.

Many of the problems I've seen, particularly with Seiko and ETA / Valjoux movements, is with those assembled from ebauches by a manufacturer or those outsourced for assembly by a manufacturer. QA, and subsequently, performance is far more likely to suffer in these instances, so it can be a crapshoot if a brand doesn't reveal who's assembling their watches - it can take a lot of homework.
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