Vintage diesel power of the SBB in the industrial works in Olten. From left Em 3/3 # 18815 "Sara" built in 1963, Em 3/3 # 18824 "Emma" built 1963 and Bm 6/6 # 18505 built in 1960. Both Em 3/3 are used for shunting duties in the IW, the Bm 6/6 is part of the collection of SBB Historic in Olten and not operational in the moment.