System Sensor 2151 Category : System Sensor This smoke detector is fairly rare. Brand System SensorModel 2151Manufacturer System SensorType Smoke Detector (Photoelectric, 4-wire)
Edwards 281B Category : EST/EdwardsThis unit is in a bit better condition than my other Edwards 281B.
Simplex 4904-9137 Category : SimplexThis strobe is the same strobe on any of the Simplex “rectangular” alarms, such as the Simplex 4903-9217. In order...