https://m.youtube.com/watch?v=5FBIj4t-gU0
This Model 5/7 is located at the Ashville Volunteer Fire Department near Stow, NY. Here it is, doing a short noon blast. Does it sound like it's a little sick, or possibly single phase? Do you think it's a 5 or a 7?
The Ashville VFD used to have another station right in the village of Ashville, but that station was knocked down a couple years ago. That station had this same exact siren, same color and mounting.