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)
Gamewell A8814 Category : GamewellI have no idea what year this alarm is from, only that it’s old and heavy.
Space Age AV32 Category : Space Age ElectronicsI have no clue why a blue-tinted strobe would be used for fire protection/life safety.
