3 Position Block - SignallingWA

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3 Position Block

Block Working in WA

ABSOLUTE BLOCK WORKING

THREE POSITION

DOWSON'S INSTRUMENTS


These Instruments were designed and built for use in Western Australia by WAGR Signal Engineer Harold Dowson.





NOTE: This page is under development - please check back later, however, if you have any additional information on this type of train working, it would be most welcome.



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