STH-10
STH-10 is an omnidirectional siren or electromechanical siren.
Also recorded as Federal Signal STH-10.
Overview
Outdoor warning siren model manufactured by Federal Signal Corporation.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
- 1.
“Federal Signal STH-10”, English Wikipedia, consulted as further reading
reference work · Reputable secondary · Wikipedia
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