The 3 types of SBB diesellocomotives built in the years 1960 to 1970, shunting in the industrial work of the SBB in Olten. In front the sixaxle Bm 6/6 # 18505, built in 1960 by SLM/BBC/SAAS and Sulzer with two Sulzer prime movers of 905 kW each and maximum 75 km/h velocity. This locomotive is part of the collection of SBB Historic since 2016 and based in Olten depot, "partly operational". Second is the three axle Em 3/3 # 18824 "Emma", built in 1963 by SLM, BBC and SAAS in a series of 41, with 65 km/h maximum velocity. Third locomotive is the four axle Bm 4/4 # 18435 (nowadays designated as Bm 840 # 435), built by SLM and SAAS in 1969 in a series of 46, with 883 kW and 75 km/h maximum velocity. The Em 3/3 and the Bm 4/4 are used as shunters in the industrial works Olten of the SBB.
