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| Steve A 454 New member ![]() Joined: 14 Mar 2007 Posts: 6 Location: Illinois |
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| Pat H. Administrator Joined: 19 Aug 2005 Posts: 9545 Location: Phillips County, Montana |
Don't know the exact years, but they were in use in the mid 70's. I would bet that you could call the Unitrol factory in Annaheim and find out. |
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| The model 800 sirens were manufactured from the early 70's into the 90's. The siren was available only by special fleet order during the 1990's. | |
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