Siemens U-MHST-MCS Category : Siemens I believe that this alarm has the ability to produce multiple tones. Brand SiemensModel U-MHST-MCSManufacturer SiemensType Alarm (Horn/Strobe)
Simplex 2098-9788 Category : SimplexFigures I’d have a few duplicates of this fairly simple light plate.
Faraday 6234 Category : FaradayThis alarm uses an electromechanical horn. It is the same horn found on the Simplex 2901-9838.
Federal Signal AV34+450D Category : Federal SignalThe AV34 light plate was made by Space Age Electronics and the 450D horn was made by Federal Signal.
