Model 8RLR Siren by Hedberg Super Sirens, 1930's

Sterling Model 20-twin Siren Light

Firehouse Model

Siren Vintage

Chloride Gent Model 1500, Civil Defense Sirens Wiki

Buy Model 8RLR Siren by Hedberg Super Sirens, 1930's Online in India

Firehouse Model

The Siren Whipple Museum

Federal Electric Type 8 Siren Lights and sirens, Siren, Electricity

superCELEREST - Sirena Signaling Devices

Model 8RLR Siren by Hedberg Super Sirens, 1930's

Vintage Sterling Model 30 Fire Truck Siren

San Jose Fire Museum - Vintage ad for San Jose's own Hedberg Siren's. These sirens were found on motorcycles and fire engines in the 1930's and 40's

Hedberg Siren by Hedberg Co., 1950's - New Zealand