Space Age AV32+2DCD That is an electromechanical horn on the rear of the strobe plate. Brand Space Age Electronics
Space Age A32-BL-SFXC-TJ24D-HA24D+HA24D Category : Space Age ElectronicsI’m pretty sure that the horn on this unit is made by Space Age Electronics. Otherwise, it’s probably a Wheelock...
Simplex 2098-9806 Category : SimplexThis device is a permanent fixture in my Simplex 4004 wall system.