Wheelock MT4-24-LSM This is an earlier version of the MT. I do have two of these. Brand WheelockModel MT4-24-LSMManufacturer WheelockType Alarm (Horn/Strobe)
Whelen Strobe-Alarm Category : OtherThis is a pretty unique all-in-one smoke detector and strobe. The brown cable in the picture is for a 120VAC...
Gamewell A8814 Category : GamewellI have no idea what year this alarm is from, only that it’s old and heavy.