The SBB Re 6/6 or Re 620 is a six-axle electric locomotive  of the Swiss Federal Railways. Their main area of application is in front of heavy freight trains on the Gotthard. The prototype reaches a top speed of approx. 140 km / h and has a continuous output of 7237 kW.
 
 The finished model consists of approx. 1421  Individual parts and can, if desired, be motorized with up to two Powered Up train engines. Motorization with Power-Functions pull motors is also possible due to the size. The roof can be removed to operate the switch on the battery box. The distinctive front or  the running boards in the front area are almost perfectly reproduced. The middle double bogie can also be moved sideways so that cornering is also possible.
 The instructions are available in four different colors. This is the standard green variant. 
 
 The model was specially developed for the M bikes available here.