Swiss railways.

 1.  The Re 420, originally (and still widely called) Re 4/4II, series are the most common electric locomotives of the Swiss Federal Railways. They are used for passenger services throughout Switzerland alone or in pairs. For freight services, they are sometimes paired with the Re 620, especially in mountainous regions.  

2.  Re 620 i.E. Re 6/6 MUed with an Re 4/4 II with a steel coil train.