Fabrique d'Ebauches de Sonceboz
The Fabrique d'Horlogerie de Sonceboz was founded in 1845 in Sonceboz in the Val de Saint-Imier in Switzerland, making it one of the earliest ebauche factories. Originally known as Rosselet & Challandes, it would become a part of Fabriques d'Ebauches Bernoises in 1927 and would join Ebauches SA later that year.