Simplex 4904-9001 This light is fairly rare. Brand SimplexModel 4904-9001Manufacturer SimplexType Alarm (Strobe)
Wheelock MT-12/24 Category : WheelockThis signal, I believe, can be used for general application purposes, as well as fire protection.
FCI MS-2 Category : FCIThe main difference between this MS-2 and my other one is that this one sport’s the company’s older logo.