500 Series

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500 Series
Company Federal Signal Corporation
Type electromechanical

The 500 Series was a line of electromechanical sirens produced by Federal Sign & Signal. It had many variations even including a coded version the 500-C witch has only one rumored location. it had a single damper supposedly witch allowed it to give of pulse signals. the most common active variation is the 500AT witch has a few known locations.

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