 From 1928 the cars were assembled by The Émile Salmson sons "(Les Fils de É. Salmson)" at Boulogne-Billancourt.Another source indicates that the cars were assembled at Argenteuil by BNC.All the production locations given here were geographically close together, in a district that had become the country's principal centre for automobile production, on the north-western fringes of Paris.