Grand Duchy of Baden State Railway
The extension of the line to Wertheim was opened as a branch line on 21 May 1906 to Stadtprozelten and extended to Wertheim on 1 October 1912. The last 3.85 kilometre-long section was owned by the Grand Duchy of Baden State Railway ("Großherzoglich Badische Staatseisenbahnen"). Wertheim had been connected by the Tauber Valley Railway with Lauda since 1868 and by the Wertheim–Lohr railway to Lohr am Main since 1881.