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Wigwag
crossing signals were built by at least three different manufacturers.
The Magnetic Signal Company, Western Railroad Supply, and Union Switch
and Signal. On the West Coast, the Magnetic Signal Company's "Magetic Flagman"
was most commonly used. In the Midwest and parts of the East, Western Railroad
Supply's "Autoflag" prevailed. The Union Switch and Signal "DW Automatic
Flagman" was used by a few roads on the East Coast, but was pretty rare.
Most wigwags were installed from the mid 1910's through the 1940's. By
then, most states outlawed further installations. The pages ahead are meant
to display photos of existing and recently removed wigwag signals and their
locations.
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