Grenchen
Grenchen is a watch city in Switzerland in the Canton of Solothurn at the German-French language border. It is called Granges in French, but this is also the name of two other municipalities in other parts of the country.
Known as Grenchen-based watch manufacturers are Breitling, Fortis, Titoni, Eterna and Porsche Design and the movement manufacturers Adolph Schild S.A. and ETA.