NW Mailing List nw-mailing-list at
Sun Sep 4 16:07:01 EDT 2022

So by first admission, I'm no expert, so take anything I might offer with a grain of salt.  My guess here is that this was indeed a "stop and proceed" only indication, but one that was originally (if not still, in 1980) a PL signal, rather than a CPL.  A position light would still have the center lense for a stop and proceed indication.  Perhaps this signal never had the center lens position removed when converted to CPL ( if it was converted.  I can't see anything lit in the linked photo)

Dr. J. Brent Greer

From: NW-Mailing-List <nw-mailing-list-bounces at> on behalf of NW Mailing List <nw-mailing-list at>
Sent: Sunday, September 4, 2022 12:36 PM
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Subject: signal

On Ebay for a few more hours is the following:

It appears to show a single-armed CPL with only the three horizontal positions occupied.  I don't believe I've seen this configuration before.  It would seem the signal could only indicate stop and proceed, but there would be no need for the center position.

Any thoughts/speculations as to the purpose of the signals or the location would be greatly appreciated.
Jim Cochran
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