The story
Socofer, a French company established in 1965, acquired the railcar fabrication business of Billard the same year. The Billard mechanical shop was founded in 1920 and their completed their first rolling stock two years later. In 1928, the growth of the business led to the incorporation of Société Anonyme des Anciens Etablissements BILLARD et Cie.
From Wikipedia’s article on Socofer, shared under CC BY-SA 4.0.4