Simplex 4051 The DC-powered version of the Simplex 4050, which runs on AC power. Brand SimplexModel 4051Manufacturer Federal SignalType Alarm (Horn)
Simplex 2904-9103 Category : SimplexThis unit is a light, not a strobe. I’m pretty sure that 2904-9103 is the correct model number.
Space Age A32-BL-SFXC-TJ24B-0000 Category : Space Age ElectronicsThis alarm came with a Wheelock EH-EL1 mounted onto it.