The Federal 15 Director and 20 Interceptor were manufactured from 1962 thru 1966, and featured a simulated mechanical siren sound. The 20A began production in 1967, with a more synthesized/electronic siren tone'
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Keywords: Federal, Siren, electronic siren
External Resource Link: http://www.fedsig.com/
Last Revision Date: 2/19/11 - 9:42 PM