The New Zealand Railways Magazine, Volume 2, Issue 2 (June 1, 1927)
Back of signal (2-position only) N.Z.R. signals are all of 3-position type
Back of signal (2-position only) N.Z.R. signals are all of 3-position type.
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Title: Colour Light Signals
In: The New Zealand Railways Magazine, Volume 2, Issue 2 (June 1, 1927)
Publication details: New Zealand Government Railways Department, Wellington
Part of: The Railways Magazine
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