As early as 1900 the RhB began to think about electrifying its routes. The planned route from Bever to Scuol in the Engadin area was intended as an experimental route in the foreground of the electrical operation still in its childhood. Several class Ge 4/6 locomotives were thus ordered, and they were delivered between 1912 and 1914. Locomotive road numbers 351 to 355 delivered chiefly by SLM and MFO turned out very well and were up to all their requirements with their performance of 560 kilowatts / 750 horsepower and a maximum speed of 55 km/h / 34 mph. These locomotives were originally painted green and between 1920 and 1923 they were repainted in the brown color customary down to the present for older design locomotives. Actually, the locomotives were supposed to be retired after the delivery of the class Ge 4/4 I. This was not possible due to the increase in traffic in the Fifties and Sixties. The locomotives were thus partially updated and remained in use until well into the Seventies. Road number 353 was retired as the last unit – but it is still currently usable as an operational historic
