Space Age AV32+2DCD

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

Also in the collection
Honeywell HFS-P

Honeywell HFS-P

Category :
Oddly enough, the model number on this particular smoke doesn’t fit the typical pattern for Honeywell devices.
Wheelock ET-1080-WS-24

Wheelock ET-1080-WS-24

Category :
You can’t really tell from the pictures, but the strobe is practically falling out of this particular unit.
@