Simplex 4904-9139 Category : Simplex I believe that this strobe plate was designed to be used with bells, such as the Simplex 2901-9333. Brand SimplexModel 4904-9139Manufacturer SimplexType Alarm (Strobe Plate)
Space Age A32-BL-SFXC-TJ24B-0000 Category : Space Age ElectronicsThis alarm came with a Wheelock EH-EL1 mounted onto it.
Gentex GX90S-4-15/75WR Category : GentexI also have the version of this alarm that is rebranded by Simplex.
