Pennsylvania O Gauge RailKing 4-6-2 Imperial K-4s Pacific Steam Engine. MTH: 30-1900-1. Evolving from a program begun in 1914 to develop heavy freight and passenger classes utilizing common boiler designs, the K-4s was an instant success.
Pennsylvania O Gauge RailKing 4-6-2 Imperial K-4s Pacific Steam Engine. MTH: 30-1900-1. Evolving from a program begun in 1914 to develop heavy freight and passenger classes utilizing common boiler designs, the K-4s was an instant success.