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/ Based on the experience gained with the bulk freight wagons developed from 1954 with meterable gravity unloading, the German Federal Railways procured various types from several wagon factories from 1959 to 1962.
Initially, self-unloading wagons without swivel roof of the type Otmm 64, from 1980 redesignated as Fc 089. Their main use was for the transport of ballast, ore and coal. In order to also sensitive bulk goods such as grain, sugar or chemical goods, the wagons were converted from the the above-described design was converted into the class Fc 089 wagons by the installation of a new Ktmm(v) 65, from 1968 Td(s) 928, were converted from the type described above by the installation of a new upper body with a swivel roof.
Between 1983 and 1986, part of the Fc 089 was sold to the Deutsche Reichsbahn.
From 1988 onwards, when the wagons reached the end of their economic life, the ranks of these self-unloading wagons thinned out. self-unloading wagons. Even today, some wagons of this type are still in service, mainly in construction trains and on various private railways.