This a site for railroad signaling. While doing some research a string of links led me to this site. It has All kinds of interesting information on signals and interlocking frames.
Here: http://www.rrsignalpix.com/uss_plates_a.php
It has a few extraneous links but the meat and potatoes are there.
Railroad signaling
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Railroad signaling
by AmericanSteam » Thu May 20, 2021 11:37 am
Just an old Alaska guy trying to live in an insane world. Degree in life, Masters in common sense.
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AmericanSteam - Posts: 2872
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