Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.
Notifier N-ANN-80 Category : NotifierThis device is part of a permanent mini system installed in my house.
Grinnell TFX-912P Category : GrinnellJust like the rest of my Grinnell equipment, this smoke detector is from Brigham Young University.
