Hi!
Here are some pictures of a HLS which has been on the roof of an police building in Kassel, Germany. The administrators of www.hochleistungssirene.de and the FHZB, an association which is working on a civil defense museum, could prevent the siren of getting scrapped. It was transported to the musem in Hamburg where it will be issued.
I took this photo last week:
In a few months it will look as good as new.
Here you can read some more about the Pintsch Bamag. German skills could be helpful. 8)