The Main attraction at Ångans Dag was without a doubt the steam locomotives of Östra Södermanlands Järnväg. The narrow gauge heritage railway has not less than eleven beautiful steam locomotives in their collection of which seven are operational. On the two HDR-pictures below you can see KM Nelsson being refuelled with water by three members of the crew. KM Nelsson was built in 1914 by AB Motala Verkstad and has a steam engine that generates 120 hp. It was originally in service at Nättraby-Alnaryd-Älmeboda Järnväg. Now it frequently is in traffic on the line Mariefred – Läggesta Nedre.
Östra Södermanlands Järnväg (Eastern Södermanland Railway) is the oldest narrow gauge heritage railway in Sweden. They started their operations on a small scale at the Lina brick works in Södertälje 1959. When the Swedish State Railways closed their traffic on the line between Läggesta and Mariefred in 1964 the society moved their operations to Mariefred and started to rebuild the track from the standard gauge to 600 mm narrow gauge. On the 24th of July 1966 interim traffic started on the new laid track. On the 19th of May the 1968 line was officially inaugurated.
When the old line between Eskilstuna and Södertälje was closed and replaced with a new line in 1996 Östra Södermanlands Järnväg got permission to use of the old line between Läggesta Nedre and Taxinge-Näsby. Having operated this line with railcar for ten years the society decided to rebuild the track to 600 mm narrow gauge. The work started in 2009 and on the 25th of May this year the new laid track between Läggesta Nedre and Taxinge-Näsby was officially inaugurated by the King Carl XVI Gustav.
Östra Södermanlands Järnväg now provides steam-hauled passenger traffic all days of the week during the summer on the line between Mariefred and Taxinge-Näsby.