The SBB needed a heavy, particularly powerful locomotive able to master steep grades on a route with many curves for freight service on the Gotthard route. Locomotives were developed in the class Ce 6/8 III that entered railroad history with the nickname "Crocodile" due to their striking appearance. The striking articulated design of these units fulfilled the long standing requirement for trouble-free transport of freight over the Gotthard.
Since improvements were continuously applied to these locomotives, they were later authorized for 75 km/h / 47 mph as the class Be 6/8 III. The fascination of the green and brown "Crocodiles" in the prototype and the model remains right up to this day.