Air raid siren - Blitz and Civil Defense full speed indoors - insane

This is a late British Cold War siren made by Castle Castings. These have 415 volt three phase electric motors, but by using a modified inverter I can run these from a 240 v single phase domectic socket. The siren produces about 135 decibels....! If you are intertested in owning one, please contact me at [email protected] . I live in the UK but am prepared to ship at cost. To use this video in a commercial player or in broadcasts, please email [email protected]