 Unlike its predecessors, it was given two driven bogies in order to be able to cope with winding routes despite its length.Between 1892 and 1921 a total of 96 locomotives were built with running numbers 103 to 198.To begin with they were designated as class H M T K V, which meant that they were locomotives built by Hartmann (H) to a Meyer design (M) as a tank engine (T) with a 750mm rail gauge (K) and compound engine (V).