WAB Fk - 831 --- It is one of the unique machine built by Wengernalpbahn in 2012. It is actually a flat-wagon fitted with driver's cab from Gk 304 a decade old wooden-boggied wagon built in 1926. It can do a max of 25 kmph. Framed by Asit Baran Das on 14th May 2015 at Lauterbrunnen.