The “Crocodile” electric locomotive, built in 1925 to haul freight through the Alps on the Gotthard Bahn, began its journey to the museum from Olten on Monday morning.
It was to be hauled to Germany where it will be pulled by another locomotive to Poland and then transferred to a cargo vessel to Sweden.
After a trip of eight days it will be transported to the Sveriges Järnvärgsmuseum in Gävle, about 170 kilometres north of Stockholm.
Painted green, with yellow trim, the locomotive will go on display for a week as the museum celebrates 100 years of electric trains in Sweden.
“Generations of Swedish children grew up with a toy model of our “Crocodile”and the model today in the bedrooms of many Swedish children and adults,” SBB said on its Historic website.
The 20-metre-long train engine is particular for being composed of three sections hinged together to navigate the curving rail routes wending through mountain passes.
The 131-ton locomotive is being accompanied by three dozen travel enthusiasts, 20 Minuten newspaper reported.
They are paying 2,900 francs for the one-way journey, which includes meals and stops in spa hotels.
The locomotive is set to arrive in Gävle on Septmber 7th and is scheduled to be returned to Switzerland on September 22nd.