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The New Zealand Railways Magazine, Volume 2, Issue 6 (October 1, 1927)

All-electric power interlocking machine, type “A.” The front cover plates have been removed, showing the levers (40 in number) and the connections to electric locking slides

All-electric power interlocking machine, type “A.” The front cover plates have been removed, showing the levers (40 in number) and the connections to electric locking slides.

All-electric power interlocking machine, type “A.” The front cover plates have been removed, showing the levers (40 in number) and the connections to electric locking slides.