Electric locomotive De 2/2 1 of the Burgdorf-Thun-Bahn (today: Regionalverkehr Mittelland), built 1899 as one of the first big 3-phase locomotive, in service until 1932 when the system was changed to standard 1-phase AC. This is the sister locomotive of the De 2/2 2 in the Verkehrshaus Luzern.
Deutsches Museum München, 2003-11-25.

tobias benjamin köhler