Met up with a couple other enthusiasts on this VERY hot day for this Allertor. This siren, one of 7 in Richfield, is located at Nicollet Park two blocks from the Minneapolis border. Richfield also has another Allertor, 3 different 2001 models, a Thunderbeam, and an SD-10. Enjoy!
https://www.youtube.com/watch?v=UDlslInUm7c