Federal Signal 450D Simplex rebranded this alarm for a little while. Brand Federal SignalModel 450DManufacturer Federal SignalType Alarm (Horn)
Fire-Lite RZA-4 Category : Fire-LiteThis annunciator is supposed to be used with the old Fire-Lite Miniscan series of panels, I believe.
System Sensor SP2R2475 Category : System SensorThis speaker/strobe was around at the same time as the SpectrAlert Classic series.
Wheelock NS-24MCW-FW Category : WheelockThis is a two-wire, white Wheelock NS with a multi-candelas strobe.