Siemens CH-MC-W Category : Siemens This is basically the white, Siemens-branded version of the Wheelock CH70-24MCW. Brand SiemensModel CH-MC-WManufacturer WheelcokType Alarm (Chime/Strobe)
Simplex 4904-9137 Category : SimplexThis is, in fact, a Simplex 4904-9137. It’s just missing its housing.
Simplex 4901-9822 Category : SimplexThis is an electronic horn, not an electromechanical horn or a speaker.
Simplex 4903-9459 Category : SimplexThis unit is an addressable horn strobe. It’s what my elementary school had installed in the classrooms.
