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File: 1505764316174.jpg (2.78 MB, 1333x2000, semaphore.jpg)

 No.4501

Anyone got a good list and/or comparison of commonly (historically and currently) used railway signalling systems (and their ups and downs)?

 No.4504

File: 1505782007711.jpg (186.5 KB, 1024x768, 6281419887_9d65020a65_b.jpg)

>>4501
>and their ups and downs

 No.4505

http://position-light.blogspot.com/

Lots of good reading over there.



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