Is this rare?

Is a box of NOS Vulcan heat and smoke detectors rare? I got these years ago and I have 5 of the heat detectors and 1 RARE smoke detector. They are all in PRISTINE condition and it came with ALL of the original manuals.

But what makes the smoke detector rare. Well first, the more common version is the one with the piezo horns I believe. Mine has a mechanical “buzzer” horn. Next, some run on 9 volts. Mine runs off of 120VAC, and it has a power cord sticking out of it.

For the look of them, the box, and the manuals, they had to be made in the late 60s, early 70s.
They came with…
5x heat detectors
1x smoke detector
1x operating manual
1x instruction manual
And 1x box.

Yes, they are very rare! Anything made before the 90’s is rare nowadays. Can you post pics of the smoke detector and maybe the heat detectors too?

I will sometime. BTW they are shiny