ETA SA – Wikipedia

ETA SA Manufacture Horlogère Suisse (ETA SA Swiss Watch Manufacturer) designs and manufactures quartz watches and both hand-wound and automatic-winding mechanical ébauches and movements.Commonly referred to as ETA, the company is headquartered in Grenchen, Switzerland and is a wholly owned subsidiary of The Swatch Group.. Though ETA was founded by Eterna in 1856 some part of its production …

https://en.wikipedia.org/wiki/ETA_SA