At introduction, the larger Rosalies replaced the Citroëns C4 and C6, themselves launched respectively in 1928 and 1929. They also represented a move upmarket for the entire business, since during the early 1930s Citroën appeared for a time to lose interest in the smaller cars which had filled their dealerships during the impoverished 1920s. The Rosalies, especially the larger 15CV versions, were offered with range of different body types: this was normal practice at the time. Though not radical in terms of subsequent Citroën launches, the look of the Rosalies was significantly more modern than that of the earlier C4 and C6 models. However, the real revolution at Citroën during these years involved production technology. André Citroën had drawn practical inspiration from his 1912 visit to Henry Ford's then new Highland Park Ford Plant in Michigan, and in 1932 Citroën was still a European leader in the application of assembly line manufacturing. Rosalies were competitively but apparently profitably priced.