Simplex 4098-9716 I don’t think that I have a base that is compatible with this head. Brand SimplexModel 4098-9716Manufacturer SimplexType Smoke Detector
STI SS-2000F Category : OtherCan’t remember where exactly I put the key for this unit. It can still open with an allen wrench, but...
Faraday 6234-E Category : FaradayI believe the “E” appendage on the end of the model number means it is a sync-strobe.