Liked: WWII Carter Air Raid Siren Siren half way through restoration, this being a full speed test via 3 phase power. This was the first time it had operated for nearly twenty years and did so without fault! Motor manufacturer is Brook Motors of Huddersfield. Siren is Carter type 1H. via YouTube https://www.youtube.com/watch?v=q5FwsIkJCXU