N&W Train Order Signals

nw-mailing-list at nwhs.org nw-mailing-list at nwhs.org
Fri Sep 15 00:34:04 EDT 2006


... The N&W also had a third arm (green in color) on some home signals, and
used it as the "calling-on arm."

>


What does this mean?

Don Trettel



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