The Royal Bavarian State Railways' sole class S 2/6 steam locomotive was built in 1906 by the firm of Maffei in Munich, Germany. It was of 4-4-4 wheel arrangement in the Whyte notation, or 2'B2' h4v in the UIC classification scheme, and was a 4-cylinder, von Borries, balanced compound locomotive. It was initially assigned No. 3201.

The Royal Bavarian State Railways was the state railway company for the Kingdom of Bavaria. It was founded in 1844. The organisation grew into the second largest of the German state railways with a railway network of 8,526 kilometres by the end of the First World War.