The following is a 13-minute edit chopped from a 3/4-inch tape-sourced 20-minute news recording I obtained of Pilgrim Nuclear Generating Station's old siren system being tested in voice, growl, and multiple times alert on the afternoon of September 29th, 1986. The exact siren model is unknown, as we never get to see it in the footage, but I'm guessing it *could be* a SiraTone (possibly a 408 or 612) given how Boston Edison liked their sirens of the time and what survives in the system today. Any more information is greatly appreciated, though. Enjoy.
https://vimeo.com/705863094