Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.
Grinnell TFX-912P Category : GrinnellJust like the rest of my Grinnell equipment, this smoke detector is from Brigham Young University.
Gamewell A8814 Category : GamewellI have no idea what year this alarm is from, only that it’s old and heavy.
