These engines were the first Type Hall unites built by Maffei. In addition they had an eccentric crank of the Hall type. This was partly external and partly internal, a feature of engines in Bavaria and the Palatinate. The boiler was entirely dome-less and had a semi-circular outer firebox above. They were equipped with Type 3 T 6 tenders.[1]
^Lothar Spielhoff (1995) [1990 Franckh-Kosmos Stuttgart], "Länderbahn-Dampflokomotiven. Band 2. Baden, Bayern, Pfalz und Württemberg", Deutsche Eisenbahnen (in German), Augsburg: Weltbild, p. 78, ISBN3-89350-819-8
Schnabel, Heinz (1987). Eisenbahn-Fahrzeug-Archiv Band 2.5: Lokomotiven bayerischer Eisenbahnen (in German). Düsseldorf: Alba Publikation Alf Teloeken GmbH + Co KG. pp. 268–270, 385. ISBN3-87094-105-7.