A-StH 92 81 2020 011-0 (V 20.011) in Lambach. This is actually the third use of class 2020 in Austria, the first was a prototype A1A locomotive BBÖ 2020.01 built 1927 by Graz/AEG with Hesselman engine and electric transmission, the second a prototype B'B' locomotive 2020.01 built 1960 by SGP with two diesel engines and hydrodynamic transmission, here the number was chosen to match the StH system (20 standing for StH locomotives not assigned to one of the lines). 2026-03-22. tobias b köhler