In the 1970', 80 of this 380 HP diesel shunter/small locomotive were built by the SLM Winterthur with a MAN prime mover. In Switzerland such vehicles are called "Traktor" (tractor) and are designated as Tm. The Tm IV # 8792 is pulling two new Uacns freight cars for pulverisized ciment of WASCOSA company, rented to the HOLCIM ciment producer, along the factory channel at Bürglen.
