After a long wait, I was delighted by the arrival of my latest effort: Classic Railroad Signals published by Voyageur Press.
This features semaphores, search lights, position lights, and one of my favorite types of antique signal: the Hall disc.
I’ve dedicate the book to the late Harry Vallas with whom I spent many hours discussing the finer points of railroad signaling.
http://www.qbookshop.com/products/215886/9780760346921/Classic-Railroad-Signals.html
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Yes, it’s a good effort. I like the J.D.Schmid SP signal photos, and Scott Lothes’ stuff is exceptional.