Simplex 2901-9840 Category : Simplex Besides its appearance, this horn is just like the more common Simplex 2901-9838. Brand SimplexModel 2901-9840Manufacturer FaradayType Alarm (Horn)
Simplex 4904-9137 Category : SimplexThis is, in fact, a Simplex 4904-9137. It’s just missing its housing.
