Signal aspects

NW Modeling List nw-modeling-list at
Thu Jan 17 16:22:54 EST 2008

Ben -

The "clear" and "approach" aspects did not have an illuminated marker light
on the bottom head.

----- Original Message -----
From: "NW Modeling List" <nw-modeling-list at>
To: <nw-modeling-list at>
Sent: Thursday, January 17, 2008 3:50 PM
Subject: Re: Signal aspects

> Ted,

> Here's a diagram of what the aspects are, both in position signal and

> CPL signal diagrams. Now, the aspects were changed around 1952 and this

> change eliminated the horizontal aspects on the B arm of the signals, and

> the marker lights underneath a B or C arm if the signal was so equipped

> were also eliminated. This marker was replaced by a letter plate "S".

> This is something Uncle EdK explained to me a great many years ago.


> Now, the aspects as I have them named: They weren't known by a "name"

> so to speak in the Position Signal era as far as I know, but now the color

> aspects are named as I have them listed. The indications are quite

> lengthy, so I left them out. I hope this helps.


> Oh, and the number plates were removed in the 60's or 70's. These

> signals now have names as per the Southern practice.


> Ben Blevins


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