 The first of an eventual four locomotives of this class to be brought to the Nelson Section, WF 404, arrived in 1915 and replaced D 144, one of the original locomotives on the Nelson Section.It was followed in turn by WF 62 in 1919 and WF 395 in 1925, with the last, WF 397 arriving from Auckland in July 1937.All four locomotives were fitted with non-superheated, or saturated, boilers.