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After the original K Class was withdrawn by the mid 1920's, the K designation was free to be used on a new class of locomotive. This became the K class of 1930, designed for heavy freight and express passenger roles in the North Island, the K and Ka class never set foot in the South Island. Only the Kb class of four locomotives, designed to pull freight up the demanding grades of the Midland Line through the Southern Alps ever worked in the South Island.
In preservation, the South Island has proven a popular stomping ground for the Ka class in preservation.
Here, the partially-streamlined Ka 942 pulls an excursion over the Cass Bank, on the Midland Line.
