Even if they work, I would never trust a vintage somke alarm, as they may fail.
They are cute, however.
In one of the branches darryl works there is a smoke alarm that is huge, it has a metal body and I would almost dare to say it's "art deco".
It is there because the library building is a historical building, so everything must be preserved. (Including the art deco Honeywell thermostats that can be seen in several areas.)
However, I am more than sure its no longer operational. I don't know if it's connected or not, but very close to it there are several high end, ultra modern detectors and the library also has a state of the art fire suppression system instead of regular fire sprinklers as water could cause damages.
The same with the fire alarm pull stations, probably made of cast iron. It's a box with a door and a small lever you pull to the side. On every station there are two pull stations. The vintage one that is protected by a plexiglass cover and a small sign that says it's not operational (so people won't be able to reach them as they don't work anymore) and right next to it a super modern Simplex "press in then pull down"., covered with one of those plastic covers that you have to lift to reach the pull station.
There is also a blue pull station saying "police" that i guess it's to start a lockdown. Not sure. I'll have to ask Darryl as he is constantly trained.
But anyway. old fire alarms are beautiful because of the design, but I doubt they worked better than modern ones and I am very sure vintage smoke alarms may fail to detect and go off if needed. Manufacturers say they should be replaced every 10 years. Just in case, i prefer to give it a huge error margin and replace them every 5 years. I would keep a vintage because of the charming design, but I'll have a brand new detector right next to it.
A good way to have the smoke alarms always "new" without draining your wallet is replace 1 or 2 per year.
Talking about that... This week I'll have to buy 10 smoke alarms, 6 CO detectors, 5 Fire extinguishers, 1 fire escape ladder, 1 fire blanket and 1 first aid kit
If I had money, even being a leased apartment, i'd make the landlord very happy by paying for a company to install fire sprinklers.