Wheelock MT4-24-LSM Category : Wheelock I believe that this is an early version of the MT series since it doesn’t have covers over the screw holes like later MT’s have. Brand WheelockModel MT4-24-LSMManufacturer WheelockType Alarm (Horn/Strobe)
Gentex GXS-4-15/75WR Category : GentexThe previous owner of this alarm “modified” the wire leads coming out of the back.
