Simplex 4904-9139 Category : Simplex I believe that this strobe plate was designed to be used with bells, such as the Simplex 2901-9333. Brand SimplexModel 4904-9139Manufacturer SimplexType Alarm (Strobe Plate)
Fike 20-1063 Category : Fiquench/FikeThis is a pretty rare addressable rebrand of the BG-12 series pulls.
EST GCWN-VMA Category : EST/EdwardsThis is a ceiling mount strobe which would be used for general signaling purposes.
