3V8 (Darley)
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The Darley 3V8, not to be confused with the 3V8 made by Sentry, is an 8 or 12 port electromechanical siren made by W.S. Darley & Co.
The Darley 3V8, not to be confused with the 3V8 made by Sentry, is an 8 or 12 port electromechanical siren made by W.S. Darley & Co.