Simplex 2098-9806 Category : SimplexThis device is a permanent fixture in my Simplex 4004 wall system.
Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.
Simplex 477-669 Category : SimplexOddly enough, the model number on this particular smoke doesn’t fit the typical pattern for Simplex devices.
