Edwards 281B Category : EST/Edwards This is a 135F fixed temp and rate of rise heat detector. Brand EST/EdwardsModel 281BManufacturer EdwardsType Heat Detector
System Sensor SP1W2475ADA Category : System SensorThe strobe portion can detach from the speaker body.
H. R. Kirkland Indicator Category : OtherThis unit bears no model number, only the brand “H. R. Kirkland,” a company that still manufactures fire alarm system...
Edwards 281B Category : EST/EdwardsThis unit is in a bit better condition than my other Edwards 281B.