 The first 112 locomotives were classified as Class RA 350 bis (with running numbers between 3631 and 3742); of these, 52 were taken over by the FS in July 1905 upon formation, while the other 60 were taken over by the new "Strade Ferrate Meridionali" (Southern Railways), a rump of the RA, until its incorporation with the FS in July 1906.The class saw widespread service on the Italian network, with the first members of the class being sent to work as helpers on the steep lines around Fabriano and Sulmona.Some locomotives were withdrawn relatively early, but as many as 60 were still active after World War II; however, their activity ceased by the end of the 1950s.