Simplex 477-669 Category : SimplexOddly enough, the model number on this particular smoke doesn’t fit the typical pattern for Simplex devices.
Silent Knight SK-PHOTO Category : Silent KnightPersonally, I think that the Silent Knight logo on the head of this smoke is a bit ugly.
Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.