Figured this thread could use a revival
Denver Quadruplex Siren, Pullman Wa city hall Ca 1933

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Denver Duplex siren Fort Coombs Armory, Apalachicola Florida I would guess 1940s or 50s based on truck

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Denver Duplex Siren, Superior Portland Cement plant, Concrete, Washington

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Denver Duplex Siren Eberts Field Aviation Airstrip Arkansas

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Denver Duplex Siren Homestead, Florida City Hall

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Denver Center Driven Duplex Siren, Wheat Ridge Fire Department, Wheat Ridge, Colorado

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Denver Quadruplex Siren, Fire Department, Grand Ledge, Michigan

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Edgewater Colorado Fire Departmet (Survived 3 building reconstructions!)

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