System Sensor SR This unit is exactly the same as my other System Sensor SR. Brand System SensorModel SRManufacturer System SensorType Alarm (Remote Strobe)
Simplex 2904-9103 Category : SimplexThis unit is a light, not a strobe. I’m pretty sure that 2904-9103 is the correct model number.
Honeywell S465B Category : HoneywellThis is essentially a slightly modified-looking version of the Honyewell S464A with a two-stage option.