Their design benefited from experience with the Baden VI b steam engines, but they were a fundamentally different class with a superheater, new running gear with larger wheels and a longer, fixed wheelbase.

The Belgian locomotives went to the État-Belge, who added 6000 to their Baden numbers; after a few years they went the Chemins de fer Prince-Henri [fr] (PH) who renumbered them 251–263.

After the Second World War 66 Class VI c engines went into the Deutsche Bundesbahn, where they were stationed at various locomotive depots including Freiburg, Offenburg, Radolfzell, Singen, Waldshut, Karlsruhe and Villingen.

Eleven were returned to PH's successor, Société Nationale des Chemins de Fer Luxembourgeois (CFL), who renumbered them 3501 to 3513, omitting 3506 and 3509.

Number 75 1118 is operated today by the Ulmer Eisenbahnfreunde ('Ulm Railway Friends') on the branch line from Amstetten to Gerstetten[3] about 20 kilometres northwest of Ulm.