Yeah, I’m certainly for you getting the system: heck doing so would probably be a lot like what Old School Fire Alarms would do given all the pull rod systems he’s showcased & (hopefully) saved.
The original SpectrAlert line is incapable of producing a chime tone, at least if you’re talking about the standard horns & horn/strobes: there are original SpectrAlert chimes & chime/strobes, but they’re very rare to find in actual service. Do you think it was one of their
3000Hz tones instead?