That’s pretty cool! It’s interesting how many more old Notifier devices we’re seeing now. In one of my university’s buildings there’s an old Fire-Lite Sensiscan 1000 with Emhart Notifier “N-Co” 6-inch bells and older BNG-1Rs behind dual-action covers.
Anyway, I wonder if that chime ever came in red, because off-white devices can be used for general signaling if they’re not marked with a “FIRE” label.