System Sensor HRA This is the Canadian version of this alarm. Brand System SensorModel HRAManufacturer System SensorType Alarm (Horn)
Edwards 281B Category : EST/EdwardsThis unit is in a bit better condition than my other Edwards 281B.
GE/EST SIGA-278 Category : EST/Edwards, GEThe metal components on this pull are a bit rusty. It is co-branded by GE and EST.