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Federal Signal STH-10 The Federal Signal STH-10 is a discontinued omnidirectional siren produced by Federal Signal over a span of 50 years.[1] It is a 12 Port Omnidirectional 10Horsepower siren, most examples are still around today.
References
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Federal Signal STH-10The Federal Signal STH-10 is a discontinued omnidirectional siren produced by Federal Signal over a span of 50 years.[1] It is a 12 Port Omnidirectional 10Horsepower siren, most examples are still around today.
References
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