Space Age AV32+2DCD

That is an electromechanical horn on the rear of the strobe plate.

Also in the collection
GE 521BXT

GE 521BXT

Category :
I think that this smoke detector might be intended for use in security systems.
Notifier F67ODT

Notifier F67ODT

Category :
F67ODT likely isn’t the model number of the unit as it was just a random number stamped on the wall...
Gaylord NC-1357A

Gaylord NC-1357A

Category :
This is a rebranded EST/Edwards 270-SPO for use in some sort of ventilator system.
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