Simplex 4050-80 Category : Simplex You can see what the horn and the light plate look like together in the last picture. Brand SimplexModel 4050-80Manufacturer UnknownType Alarm (Light Plate)
Simplex 4903-9102 Category : SimplexUnlike the Simplex 4903-9101, this is a light plate rather than a strobe.
Wheelock MT4-24-LSM Category : WheelockI believe that this is an early version of the MT series since it doesn’t have covers over the screw...
