NSB Class IV
The NSB (Norwegian State Railways) Class IV (as in the number four, or "fire" in Norwegian) or Tryggve Class was a class of 1,067 mm (3 ft 6 in) narrow gauge 2-4-0T steam locomotives built by Beyer, Peacock & Company in Manchester, England. The 3 ft (914 mm) gauge Beyer Peacock locomotives built for the Isle of Man Railway strongly resemble this design.

The NSB (Norwegian State Railways) Class IV (as in the number four, or "fire" in Norwegian) or Tryggve Class was a class of 1,067 mm (3 ft 6 in) narrow gauge 2-4-0T steam locomotives built by Beyer, Peacock & Company in Manchester, England. The 3 ft (914 mm) gauge Beyer Peacock locomotives built for the Isle of Man Railway strongly resemble this design.
Further reading
[edit]Bjerke, Thor; Hansen, Trond B.; Johansson, Erik W.; Sando, Svein E. (1987). Damplokomotiver i Norge. Norsk Jernbaneklubb. s. 222–224, 232–233. ISBN 82-90286-09-0.