What has a 38-hour power reserve, can be found in watch brands both big and small and is at least partly responsible for the incredible growth of microbrands over the last couple years.
That would be the ETA 2824-2 movement. ETA is a subsidiary of Swatch Group. The 2824-2 is an automatic 25-jewel movement and is found in watches of all kinds — from affordable ones to higher end models.
Here are a few watches that use the ETA movement
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