Simplex 4903-9101 Category : Simplex This unit was new and has never been used. Brand SimplexModel 4903-9101Manufacturer UnknownType Alarm (Strobe Plate)
Space Age AV32+2DCD Category : Space Age ElectronicsThat is an electromechanical horn on the rear of the strobe plate.
Potter OSYSU-A2 Category : PotterI honestly have no idea what this thing is, but it says Potter on it, so that means it goes...
