Simplex 4903-9418 Category : Simplex The lack of TrueAlert branding on the front of the alarm, as well as the odd grille, are signs that this is an early version of the TrueAlert. Brand SimplexModel 4903-9481Manufacturer SimplexType Alarm (Speaker/Strobe, 4-Wire)
Simplex 4259-25 Category : SimplexThis is a photoelectric smoke detector from the mid to late 1970’s.
Edwards 881ALD-AW Category : EST/EdwardsThis type of horn is actually still manufactured by Edwards today. According to their website, “These can be used wherever...
