EST 757-7A-T Just a regular Integrity. Brand EST/EdwardsModel 757-7A-TManufacturer ESTType Alarm (Horn/Strobe, 4-wire)
Simplex 2098-9201 Category : SimplexThis is a “TrueAlarm” series detector. It is tested with a magnet.
Edwards 270-SPO Category : EST/EdwardsThis pull station is an older 270-SPO. For a comparison, check out my other Edwards 270-SPO.
Faraday 5940 Category : FaradayYou can see straight through the grille on this horn to the metal plate on the mechanism.