Simplex 2098-9642 I do have two of these heads, but only one of the bases. Brand SimplexModel 2098-9642Manufacturer HochikiType Smoke Detector
Notifier F67ODT Category : NotifierF67ODT likely isn’t the model number of the unit as it was just a random number stamped on the wall...
Notifier BG-1 Category : NotifierThis unit’s physical condition is somewhat decent, but it is missing its switch unfortunately.