Simplex 2903-9101 Category : Simplex This strobe plate is like my Simplex 2903-9001, except it has a regular strobe inside of the lens instead of a light bulb. Brand SimplexModel 2903-9101Manufacturer UnknownType Alarm (Strobe Plate)
Simplex 4050-80 Category : SimplexYou can see what the horn and the light plate look like together in the last picture.
Simplex 4901-9822 Category : SimplexThis is an electronic horn, not an electromechanical horn or a speaker.
