The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Tue Mar 13, 2018 6:07 am 
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What years were the thunderbolt 7000 series produced and what year were they discontinued?


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PostPosted: Tue Mar 13, 2018 1:38 pm 
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The earliest I have seen them referenced personally was a 1983 catalog. I'd assume they ended production when overall thunderbolt production ended in 1990.

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PostPosted: Tue Mar 13, 2018 8:58 pm 
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It's been covered before but here's the catalog page:

http://www.jmarcoz.com/sirens/sc7.pdf

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